If it wasn't for the compile time being that slow — that's a thing that I really don't like about the language, but maybe it's our project that's too big, I don't know. I don't know what to throw at you that you couldn't build, but say you'd have to build, I don't know what — a PID controller for an airplane. Thorsten: You don't know the domain and you don't know yet how you're going to build it and you don't yet know which parts you're going to need.