I’d argue Rust’s editions are a good counter argument to that. The differences between editions really aren’t huge despite being breaking changes. In theory I

I’d argue Rust’s editions are a good counter argument to that. The differences between editions really aren’t huge despite being breaking changes. In theory I like the idea of backwards compatibility never changing but in reality some breaking changes really do make sense and being permanently on the hook for a language feature that didn’t take X or Y into account when it was created doesn’t feel like a win.