@tmcw C losing its social license for new low-level projects is probably by far the best and most consequential. Oceans of pain and waste saved, even at the cost of flamewars.
All ML applications aside, decent HLL GPU tooling is incredible. Doing with a couple lines of crisp python what used to take a page of CUDA is a big, big deal in all kinds of simulation, graphics, etc. (Admittedly you could date this as far back as maybe 7 years ago, so.)
Mastodon and Bluesky, warts and all.