I’ve not yet reached Act 3 where I hear it has the most impact so performance has been fine for me
And unless you plan on stopping the game on Act 2, eventually you will reach Act 3 and understand why I and others are complaining about CPU affinity.
Take the Steam Deck, for instance. The community started by celebrating how Baldur’s Gate 3 ran at a locked 40 FPS on the system, how great the studio is, how fun. Wait a few days for people to reach Act 3, and now they’re struggling to maintain 20 FPS, borderline unplayable. That’s the difference.