This is also my story, though I added a two year sprint of using swaywm inbetween manjaro i3 and (in the next week) being 100% all-in on nixos at home.
You two are a step ahead of me. Been really enjoying Manjaro Sway edition the last couple years on a Framework laptop. I am in line for the AMD Frameworks and considering whether its arrival is the ideal moment to dive into NixOS. What do you think, am I too ambitious going that route with unvetted hardware?