Rewriting critical stuff like hand-written SIMD takes a long time (though not as long as it took ARM because ARM had to overcome everything being written in jus

Rewriting critical stuff like hand-written SIMD takes a long time (though not as long as it took ARM because ARM had to overcome everything being written in just one ISA). Even a decade in, there are still lots of low-hanging fruit in RISC-V compilation that is still being dealt with. There's quite a few really great talks about the progress here and I think we're going to continue to see major gains in RISC-V performance via compiler changes for quite a while longer.