This is going to give rise to a utility-belt of sorts, which is what I'm really looking forward to. There are many collections and common utilities that we've all been hand-writing for a while (e.g. waiting for Set(string) instead of map[string]struct{}, or a TreeMap(string, Thing) instead of maintaining sort order separate or using reflection for an existing lib).

> Methods may not take additional type arguments

While I can fathom the complications that arise, I'm hoping they can work past this restriction by launch.