almost all CPUs share similar instructions nowadays. they don't differ alot from each other. even the, some old CPUs become obsolete because devs do not care about their specific strong suits.
all GPUs are compliant to similar directx guidelines. some games in 2021-2022 could not be run on Kepler and older GPU architectures. Some games simply run horrible on older GCN cards (gcn 1/2). Nope, its a no mans land out here in PC. do not act as if minimum requirements mean anything.
if it runs at 720p, lowest setting, lowest textures 30+ fps with minimums to 20 fps, they will denote it as the minimum. does not mean that no one would play like that. even suggesting people to play with ps4 settings @30 fps at native 1080p, some PC folk take that as a insult and they would rather upgrade their hardware to something new
no dev ever specifically tests pc builds out there. they just design their games for a console and then port it to PC. how it runs on similar PC hardware depends on how many featureset it supports and how well it can use low level APIs such as dx12/vulkan. its completely up to the GPU's ability to run those said games well or not. A rtx 2060 can easily outpace a 1080ti when async/dx12/vulkan stuff is involved. Not a single dev goes out and makes use of 1080ti's exquisite compute power over a rtx 2060.
and there's simply no performance specs for any build out there. they can't even say that you will get 1080p 60 fps with a gtx 1080. they simply can't. they never will. its all up to you. they blurt out some weird graphical settings that usually goes way overboard in nerfing the graphics, like how it happens with rdr2's textures.
you can get 1080p 40 fps on a random gtx 1070. which dev cares? they can recommend a gtx 1060 but it can end up running the game @1080p 40 fps with medium settings. what kind of a recommendation that is, then? its just a recommendation of being able play the game at upwards of 30 frames witout jarring interruptions. that's it
2 gb cards were abandoned by most of the devs, they don't make special textures for 2 gb cards. they won't make special textures for 4 gb cards in the future. they will all go obsolete with hideous looking textures in the future. they can still run the game, does not mean they will un said games optimally.
once a game requires dx12.2, anything before Turing will go obsolete. it can happen in quick fashion. Anything before Pascal became obsolete very quickly. only thing that stops a similar thing from happening is the hardware drought. if ampere had ample stocks, you would see pascal/gcn utilization deteriorate in steam hardware surveys.