I'm not sure if that was the best example to showcase NilAway. I understand there's a lot of context omitted to focus on NilAway's impact, but why is foo return

I'm not sure if that was the best example to showcase NilAway. I understand there's a lot of context omitted to focus on NilAway's impact, but why is foo returning a channel to bar if bar is just going to block on it anyway? Why not just return a *U? If foo's function signature was func foo() (*U, error) {}, this wouldn't be a problem to begin with.