I will give you an example... not mine... from a old Game Developer Conference.
"Another problem with having a large variety of hardware is that the video game developer cannot reliably predict a user's personal set-up. This lack of information means that a game can not be easily tailored to exploit the strengths and circumvent the weaknesses of a particular system. For example, if all PC's had hard-drives that were all equally very fast, then a game could be created that relied on having a fast hard-drive. Similarly, if all PC's had equally slow hard-drives, but had a lot of memory, then a game could compensate for the lack of hard-drive speed through various techniques, such as caching data in RAM or pre-loading data into RAM. Likewise, if all PC's had fast hard-drives, and not much memory, then the hard-drive could compensate for the lack of much memory by keeping most of the game on the hard-drive, and only spooling in data as needed."
If you have to make your game to run in both the minimum specs and max specs you are already compromising the max spec target.
You could (if you have money and time) to code specific features for the max spec but these will be a plus because the game were designed to work on minimum specs and not to "tailored to exploit the strengths and circumvent the weaknesses of a particular system".
If a talented team you choose today to develop a game focused only in RTX 4090 with best Intel CPU in the market the result will be something jaw dropping with the best of PC can offer.
That won't happen (because you will limit your user base to bare minimum and not get the sales to cover the budget of the project) and the minimum specs will continue holding the top hardware on PC to be proper utilized.
But somehow you guys believes it is different in multiplatform development for consoles lol
I have no issue in say that the amazing game released last week (God of War Ragnarok) was very limited to PS4 hardware to the point that PS5 is being sub-utilized running it while that Xbox fans dreams that Series S doesn't limit Series X and PS5 development
I do support exclusive development... and more I support that developers choose to increase drastically the minimum specs target for their PC games... I want evolution and not stay years being limited due lower specs hardware.... why not do a new Crysis on PC? Shake the market... push for higher specs.