Short answer: if your Bambu Lab P1S is already doing the job, most owners should keep the P1S and save the money. The Bambu Lab P2S is the cleaner current default for new buyers, but that is not the same thing as being an automatic upgrade for existing P1S owners.
The upgrade only starts to make sense when you are not just feeling gadget itch. It needs to solve a real ownership problem: regret about staying on the older branch, a planned one-printer standardization move, or a workflow reason that makes the newer enclosed default worth paying for instead of continuing with a machine you already know.
When keeping the P1S is the smarter move
Your P1S is already stable and productive
If your printer is running well, handling your normal PLA and PETG work, and not creating daily frustration, the upgrade case is weaker than it looks. The P2S is easier to recommend to a new buyer, but existing owners should be harsher about what counts as a real gain.
You would rather spend the money on materials, nozzles, drying, or more print volume
Many owners get more real output from better filament handling, backup wear parts, or simply buying more material and printing more often than they do from switching from one capable enclosed Bambu lane to the next. If your bottleneck is not the machine itself, the upgrade usually does not pay back clearly.
Your real need is not a newer enclosed single-toolhead printer
If you are actually bumping into support-removal pain, multimaterial curiosity, or workflow limits that make a single-toolhead machine feel cramped, the better move may be stepping out of this branch entirely. In that case, skip the P1S-to-P2S debate and look at the X2D lane or the broader Bambu chooser.
When upgrading to the P2S can make sense
You want to reset onto Bambu's current mainstream enclosed branch
The strongest non-spec reason to upgrade is simple: you want your main enclosed printer to be the current default, not the older value alternate. That matters most for owners who plan to keep one primary machine for years and do not want to keep second-guessing whether they should have moved to the newer branch sooner.
You are standardizing around one current machine instead of casually keeping older gear forever
Some buyers are not hobby owners slowly accumulating printers. They want one main enclosed machine, one standard, and fewer branch decisions later. For that kind of owner, the P2S can make sense as a cleanup move even if the P1S is still competent.
Your P1S replacement moment is already here
If you were already close to replacing, retiring, or reassigning the P1S, then the decision changes. This stops being an "upgrade for the sake of upgrading" question and becomes a plain current-buy decision. In that situation, the P2S is usually the cleaner answer.
What if the real next step is not the P2S?
This is where a lot of owners get stuck. The P2S is the cleaner answer if you still want the same mainstream enclosed Bambu lane, just on the newer branch. But if your frustration is actually about workflow limits instead of branch age, the better move is often to stop treating every next purchase as a P1S-versus-P2S question.
Move toward the X1E if your reason is more control, policy, or business-facing deployment
If you are not chasing a newer default so much as a more controlled, more business-facing enclosed setup, the better checkpoint is Should You Upgrade From a Bambu Lab P1S to an X1E?. That page is the better fit when your real hesitation is about engineering-material confidence, office or lab expectations, or whether you should move beyond the workhorse branch entirely.
Move toward the X2D if your reason is dual-nozzle workflow rather than a cleaner single-toolhead default
If support-removal pain, material separation, or color-heavy work is what keeps pushing you to shop again, the better checkpoint is Should You Upgrade From a Bambu Lab P1S to an X2D?. That is the page for owners whose next printer needs to change the actual job flow, not just reset them onto Bambu's newer mainstream enclosed branch.
What this is not
This is not a good upgrade if you are hoping the P2S will magically unlock a different class of printing. It is still part of the mainstream enclosed Bambu lane. If you need a big workflow jump, the smarter question may be whether the P2S is overkill for your actual work or whether your next move should be a different branch entirely.
Who should keep the P1S?
- owners whose P1S is already reliable and producing the parts they need
- buyers who would feel the money more than the branch change
- owners whose real bottleneck is materials, drying, post-processing, or time, not the printer itself
- shoppers who are only tempted because the P2S is newer, not because the P1S is failing them
Who should upgrade to the P2S?
- owners already at a replacement or re-standardization point
- buyers who want their main enclosed printer to sit on Bambu's current default branch
- people who are sure they still want a mainstream enclosed single-toolhead machine, just the newer one
- owners who know they will keep wondering about the P2S until they either move up or rule it out clearly
What to do if you are still unsure
If your question is really "is the P1S still enough?" read the P1S worth-it page. If your question is "would I choose the P2S if I were buying today?" read the P2S worth-it page. If your question is really broader than one upgrade step, use the Bambu route page.
Still testing the upgrade idea
Re-check the P1S lane
Use this if you need to decide whether the P1S is still the right workhorse before you spend anything.
Need more control, not just a newer default?
Check the P1S-to-X1E decision
Use this if your real question is whether to move into the more business-facing enclosed branch instead of just resetting onto the newer mainstream one.
Need dual-nozzle workflow?
Check the P1S-to-X2D decision
Use this if support material, color separation, or workflow payoff is the real reason you are thinking about replacing the P1S.
Thinking bigger than one upgrade?
Use the Bambu route page
Use this when the real question is not P1S versus P2S, but which current Bambu branch actually matches your work.
Need output, not another printer?
Talk to JC Print Farm
Use this if buying the next machine is a distraction and you mainly need dependable parts without another ownership jump.
Job already defined?
Request a quote
Use this if the machine debate is only holding up a part or batch that is already ready enough to price.
Bottom line
Most current owners should keep the Bambu Lab P1S unless they are already at a replacement point or have a clear reason to move onto the newer mainstream enclosed branch. The Bambu Lab P2S is easier to recommend for fresh buyers, but for existing owners, that alone is usually not enough to justify the spend.