I loved my Performance MX. I finally had to replace it at work (software wouldn't install after migrating to Windows 11) and the MX Master 3 I got seems much ergonomically worse to me. I also am not a fan of the thumb wheel replacing buttons. Only thing I won't complain about is that the resolution is better. From testing my coworkers' mouses (older Masters) I'm pretty sure they have each been a step downhill from my perspective.

My sister in law gave me her G700S to fix the main button microswitches, and she convinced me that it's the apotheosis of the design - it's what should have replaced the Performance MX. No soft-touch plastic, extra buttons, and the higher resolution sensor. I'll probably have to get one off eBay.

Edit: also all of the Masters have non-user-replaceable batteries.

Those are great but often expensive mice. I wish the Apple tax didn't extend to third party hardware, but here we are.