[bbbobbb]

This only sounds like a 'problem' because the lisp dialects are so similar that you would almost expect them to be the same, no?

That seems like a nice feature - you know Common Lisp so you have to only learn some nuances to write PicoLisp effectively.

When it comes to the c-family of languages, you wouldn't expect a complaint about having to be aware of the differences between C and JavaScript since you can't even entertain the idea that they are all that similar.