Currently if you want to return from a function/method you need to type `return` in the source code. And return is a single expr, it can't be chained or embedded, and in almost all cases it exists on its own line in the file. This is an important invariant for Go, even if you don't understand or buy its motivation. `?` would fundamentally change that core property of control flow. In short, chaining is not considered to be a virtue, and is not something that's desired.