Which implementation do you use?
No surprise considering how gimped the personal edition is (which is even one major version behind). I wish they had a sort of revenue restricted Community Edition just like embarcadero is doing now. I'm old and I don't mind paying for tooling, but how many are dropping $750 on the Hobbyist edition?
I tend to call the attention for these Lisps, just because it seems a large amount of developers aren't aware what they are actually loosing in productivity by sticking with their free (gratis) tools.
Embarcadero is another good example, given what Delphi and C++ Builder were already capable of. Although here they have themselves to blame how Borland lost their hobby market ethos.
The class explorer is also excellent for navigating CLOS heavy codebases. Profiler and overall IDE experience is far better for anyone without Emacs Stockholm syndrome (which I do have btw).