Assume Rust is a better system language than C, which Linux is written in. In order to get something 10x better ... you're gonna need better algos, or come with something that solves more problems in less code. Otherwise I don't see the point. A better, stronger claim is: let's rewrite sub-system 'X' in Rust which implements simplifications 'A,B,C,...' Unless there's an order of 10 improvement ... the cost will not be overcome by benefits.