Yeah, and the other thing is that the macrostep expander in slime makes it fairly straightforward to understand how an unfamiliar macro works: you just expand i

Yeah, and the other thing is that the macrostep expander in slime makes it fairly straightforward to understand how an unfamiliar macro works: you just expand it a couple steps and see how its mapping the surface syntax to utilities you know. In fact, I often find function calls harder to grok now than custom macros :)