Windows 11 and Photo Lab 10.
I am still using Windows 10 on a machine with an i7 6700 processor and 24gb of ram that I purchased in 2016. It has been upgraded with a new power supply, an nvidia RTX 4060 graphics card, and a WD Black 2T SDD C; drive . While not as speedy as a newer machine it runs PhotoLab 10 reasonably fast with no issues. The AI features all work with no performance issues on Windows 10 and in fact the performance running PL10 is better than PL9 on this same Windows 10 machine. There has obviously been a lot of optimization in the current version.
Mark
I think you are spot on re optimisation. Performance here with PL9 was awful on an M4 iMac with 16 gig. Now running the trial of V10 and it is a definite improvement. Not as smooth as Lr but now, so far, it looks good enough.