That sounds like an example of it being exactly like this (since neither Go nor C++ have had any breaking changes either AFAIA), or am I not understanding something?
Sorry, I didn't make the point I wanted to, which is that GP (on my reading) seems to think that breaking changes are necessary and unavoidable for the long-term health for a PL. I'm saying Clojure seems to be perfectly fine even without any breaking changes in over 10 years, and that it seems like it'll continue like this indefinitely.