I wouldn’t get a P1S today. Switched from X1C to X2D and there are really lots and lots of improvements in the new generation, many not visible in the technical data or marketing materials. For me, one of the most important is the easy nozzle swap, relevant when you want to to print fine details with a 0,2mm nozzle. In the first generation, you have to unplug and replug 3 connectors, that are rated for less than 10 cycles by the manufacturer.
The new hotends also are far more capable. In the X1C, 22mm3/s was on the edge of what the hotend can handle and with a serious degradation in layer adhesion compared to slower speeds. I tested the new hotends up to 30mm³/s without bringing it to the limit. And that is with the regular hotend, not HF.
Inm many respects, the new generation seems far more polished to me. Z-homing is smoother and faster, automatic bed levelling is more intelligent and only levels the part of the bed that is actually used, automatic flow dynamics works excellent and doesn’t depend on material color and bed type for X1C ore none at all in P1S, nozzle cleaning is better, although there is still a bit of room for improvement in the SW, I could go on and on.
And then there is future software support. I’m not sure if new features are still provided for P1S. For X1C they only provide security updates. If P1S still receives new features then probably not for long anymore.
About P2S vs X2D: I think they are very similar with some features added in the X2D. Of course more parts and functions means more things that can potentially brake. And of course using a P2S is far simpler because many topics only arise with the second nozzle. Think about: how do you distribute your AMSs between the two nozzles? Do you want the additional Filament Track Switch that is known to make problems for many? Slicing gets an added layer, although I think they did a great job with the assignment in Bambu Studio.
If you just ignore the second nozzle at the beginning, I don’t see any downsides. The problems reported here a bunch of times seem to apply to both. And I think it is just a very small percentage of units that was delivered with problems.