It doesn't pay off for most apps to run on GPUs because of the fragmentation, bad dev experience, sad programming language situation, proprietary buggy sw stacks and so on. Reining in the cambrian explosion to let applications actually use GPUs would be a good tradeoff.

(But of course like you say this doesn't detract from the native code apps that want to debug, support, bug-workaround, perf-specialcase their app on N operating systems x M GPU hardware archs x Z GPU APIs, x Y historical generations thereof)