> But nobody would really care.
no, you should say that you personally wouldn't care, but that does not generalize.
People do care, just like people prefer eating better food than just bread and milk. And after having had a taste of the good stuff, people do not want to revert - loss aversion is real.
So if consumer devices regressed back to only having 1gb of ram, they will feel the loss, and they will complain if nothing else. The world of lean, efficient software that require little ram will not return. Programmers (read:companies selling products) will not adapt, but instead, the requirements for computing will become more exclusionary to those with the means.