That's what it was for me. I'm really fuzzy on the details because this was years ago. When I first heard about Guix, I wanted to try it (even though I didn't u

That's what it was for me. I'm really fuzzy on the details because this was years ago. When I first heard about Guix, I wanted to try it (even though I didn't understand the benefits) but there was some unfree part I needed to install it. And ideologically they were against that. There either weren't good tutorials on how to bypass it or it was not even possible. So I just didn't install it. FWIW Nix does not allow unfree packages by default or, at least, that's what having to add a package to allowUnfreePredicate makes it feel like.