Probably the biggest lesson I've learned simply looking at games here like AC: Odyssey, Hitman, Shadow Of The Tomb Raider, etc, is that if you give games devs +50% more horsepower, they'll go out of their way to make sure their games run half the speed again for everyone... Seriously modern AAA's are appallingly optimised vs the era of say 2010-2014 where Dishonored 1, Skyrim, Bioshock Infinite, DX:HR, Alien Isolation, etc,
ran over +90-120fps even on low-clocked 3.1GHz Sandy Bridge i3's at the time (and today those titles run at +120-180fps on a lowly G4560). And when you look at the disparity of what's "justifying" a halving of fps given 3x the cores, (eg, is AI 6x smarter? Levels 6x larger?, etc, on 6C/12T CPU's getting 50-60fps vs how games only a few years old were on 2C/4T's getting 90-120fps at the time), there's little actual game design improvement and most of the modern slowdowns (especially for single-player titles) seem to point towards virtualization + obfuscation based DRM (Denuvo) and lazy optimization as the biggest culprits.