I'm curious now, how many fps did you get on a Haswell in any of the big cities in Starfield or in BG3 act 3?
25-30 (I didn't play Starfield much but I assume New Atlantis counts?), I guess if you tried looking hard enough you would probably find something below, but I don't play watching FPS counter all the time.
Admittively, there were also some micro-stutters in some area transitions (entering a building etc).
Surprisingly enough though, in combat I rarely had any stutter or noticeable FPS drop, but AI did sometimes think for a while during turns in BG3).