'this is not true in numerics' - shows no evidence...
GPUs are gaining traction in FP workloads, it can be seen clearly with CPU/GPU data-center market share
Moore's law is pretty much over, we can't simply print more performance these days, we are going to see major shift to accelerators which would require some rewrites, otherwise you're going to be stuck
Did you even read what you linked? I wouldn't say "already happening" more like first early steps. Operating systems have a massive attack surface, would take years to convert code from C\C++ to Rust and likely be more vulnerable initially(the old code base went through decades of scrutiny, hundreds of scanners\fuzzers etc)
GPUs are gaining traction in FP workloads, it can be seen clearly with CPU/GPU data-center market share
Moore's law is pretty much over, we can't simply print more performance these days, we are going to see major shift to accelerators which would require some rewrites, otherwise you're going to be stuck