I guess I’m in that camp. I can come up with a good abstraction after working on a problem for a while and refactor it into my code. Or I can come up with a really simple abstraction (eg a Go interface with 2-3 methods), and that usually works well. But I try to avoid starting a project by defining a bunch of abstractions, since I just end up writing loads of boiler plate. Yes, I’m probably doing some things wrong.