Rune is not mature and is developed by a handful of people. Please check the thread I linked, literally everything you could say has already been addressed.

Saying "X is better than Y" or "Why not Z?" is not constructive at all.

It is constructive, though - Lisp used to be fun when parsing complex language grammar was not as trivial as it is today. I loved it, and I worked with muLisp for many years... in the '80s and '90s. For AI (or, rather, "expert systems"), it was without a match... prior to the '80s, though. There were Lisp machines even... in the past.