I love the idea of more rust into linux because I think it will make the code more secure and easier to contribute/modify. I am scared of any potential problems an immature ecosystem (relative to C ofcourse, don't jump the gun) can cause to this life-depending tool called the linux kernel. I am glad linus is open to it but careful. Balanced approach

Edit: I am also a proponent of careful re-writes of very old userspace utilities (eg: ping) accompanied by very rigorous tests to ensure there aren't any behavour changes