Aside from the massive performance penalty, cache thrashing and context switching, this code will also leak a goroutine (and so, memory) if you don't finish rec

Aside from the massive performance penalty, cache thrashing and context switching, this code will also leak a goroutine (and so, memory) if you don't finish receiving from `ch`. It's more brittle, longer to write, less local and in every other way worse than a for loop. Why would you ever do it?