Popularity does not mean good. Also I assume most killer apps use right tool for the job - For example in a corporate setting with multiple developers something

Popularity does not mean good. Also I assume most killer apps use right tool for the job - For example in a corporate setting with multiple developers something like Java would be better. I speculate the following - if there are few developers who love lisp, then all can try to mob program a lisp code base -- multiple cursors, same time (code review and development all happen parallel). (Not sure if such an editor exists) This would be a good way to maintain a lisp code base I think (speculation). (Compared to Java where you can work mostly alone and make a mess and it will still work somewhat OK)