In place of iterate, as tagbody still has a very specific place in the arsenal that loop doesn't fully solve. Or maybe it does and I'm missing something. I'm probably missing something.

Absolutely agreed that iterate would classify as a DSL, too. It's just that I prefer exploratory code to read like English as it forces me reason about what I'm trying to do. But honestly I haven't used iterate as much as I perhaps should have, I might need to change that.