Yep, that's what I mean. I originally started to write something that explicitly called out some of the other examples as cases of talented amateurs (in the be

Yep, that's what I mean. I originally started to write something that explicitly called out some of the other examples as cases of talented amateurs (in the best possible sense of the term, and only vis-à-vis actual coding as opposed to producing books and theorems). But, the cases of Cutler and Moore are probably what we mean by "longest-serving".