cfg_select! looks good. cfg_if! always added so much boilerplate that it rarely reduced complexity, even though it offered a valid solution for when you had a complex condition in one branch and then not() that in the other. It was also annoying that you had to add a dependency for those rare cases.

We did also move away from cfg_if!, though, because IDE tooling would mostly just quit working within the cfg_if! macro call. Will have to see, if that's better with this compiler built-in, or if the IDE tooling gets updated to support that well.

This one is so much bigger than recent releases, exciting!