Pretty much all of them do. Many of the big leaders in the C++ world, like Google, are pushing the idea that every last optimization technique is crucially vita

Pretty much all of them do. Many of the big leaders in the C++ world, like Google, are pushing the idea that every last optimization technique is crucially vital. Google can bank on tenths-of-a-percent of performance, so why can't you? Google can devote armadas of armadas of test machines to run asan/tsan/space-alien-san and everything else continuously, and it works pretty well for them, so why can't you do this too?