That's hardly an argument for using C though. Successful OSes today were started years ago when there was barely anything else to use. It takes a long time for

That's hardly an argument for using C though. Successful OSes today were started years ago when there was barely anything else to use. It takes a long time for OS to gain success. Rust is so young, that to evaluate success of an OS written in it, you'd need to wait comparatively. So time will tell.