If you could change anything about Linux without worrying about backwards compatibility, what would you change?

In other words, what would you change if you could travel back in time and alter anything about Linux that isn't possible/feasible to do now? For example something like changing the names of directories, changing some file structure, altering syntax of commands, giving a certain app a different name *cough*gimp*cough*, or maybe even a core aspect of the identity of Linux.