IIRC, at some point rustc was not able to self-host on 32 bit platforms due to the amount of virtual memory it used. I don't know if it has been fixed yet, but

IIRC, at some point rustc was not able to self-host on 32 bit platforms due to the amount of virtual memory it used. I don't know if it has been fixed yet, but I can imagine that this would be an issue if you want your entire package repository to be self-hosting.