sounds like a waste of investment and resources. why lower the quality of rendering? the end goal of doing this is so AMD/NVidia can invest less in the hardware, and offer your cheaper hardware that barely runs the game with a ton of hacks enabled to make it run.
they have the capability to produce hardware far superior than they're offering us, but won't in favor of introducing small upgrades every year with capability they already could have matched years or decades earlier, and they have created the low end and mid range to attempt to extort money by forcing everyone to buy the high-end when their hardware/software doesn't work without it. nothing like buying a cheap version that makes you cringe and wanna throw your laptop or desktop across the room because it runs like crap, forcing you to opt for the $3000 version next time to avoid the same experience.