I'm not sure too many people could write a test suite for LOOP in his spare time. Never mind the rest of the trickier parts of the language such as MOP, CLOS, packages, conditions, restarts, etc. etc.

> in his spare time

I don't wanna be -that guy- but ... github lists 5 contributors on that repo. "his" is doing a lot of work in your claim there.

I stopped working on that for a number of years, and others maintained it, but the original test suite was just mine. Look at the ILC 2005 paper in the doc/ directory there.

maybe medium? Compare to scheme... this is why I said large-ish, not large. There are lot's of corners to get into in CL.