> Smalltalk, for example, does support browsing either all the implementors of a method selector or all the methods of a class

That’s pretty neat. I tried using the object browser a million years ago and it confused me, but I didn’t know anything about anything at the time. Maybe Smalltalk deserves another look.

Smalltalk IDEs are usually multi-window, so it isn't either/or, it's by method selector and by class instance methods and by …