Inertia is just a sign of maturity. It's fine. Nothing wrong with it. Especially when the new stuff is happening along side it. In 10 years there may be people asking why you're using arch or nix, when whatever new thing is superior. But it'll just be proof that nix can run in production for 10+ years.
Day9. Though I just rewatched a funday Monday from episode 200 or 300 and it was just as amazing and fun as it was back over a decade ago.
I watched newer stuff he still seems to be a great guy.