Jef was a huge proponent of incremental search. That hasn't become mainstream-ubiquitous, but it is certainly code-editor-ubiquitous. Jef being an extremist, he wanted incremental search as the only mechanism for moving the cursor.

I have tried editing using only incremental search, and it was awful right up until the moment when I reached for it first instead of wanting a mouse or arrow key and then remembering I was only supposed to use incremental search.

From that moment on, I sailed along just fine. Does that mean it might have "won?" Certainly not, but all the same... Success in software design is absolutely not any kind of meritocracy outside of the tautological "If it won, it must have merit, winning is the metric for merit."