Hardware must be well supported in fully-libre-land ... had to go nonguix pretty much right away.

Yep, same here. I started with nonguix. I didn't realize it was easy to add additional channels.

Profound meditation and enlightenment on the essence of Scheme is a must. I had one of those ‘no, this is where you don’t want a closing brace’ moments and my zen was blown out of the water.

Aaaah. I juuuust had this happen to me. Took me a bit to balance the parens again! 😂 Although, so far Scheme seems nicer than Nixlang. I've also had curiosity to learn a functional language, so Guix gives me a reason to learn about functional programming.