how so? what is left after having the system daemon start at boot? this is a super common thing to do. If you wanted to go a step further you could even create a couple chroots or other immutable partitions to swap the bootloader to. This would be a great way to use the package manager and features of nix without the limitations. There is nothing proprietary about what nixos does.
The whole nature of arch is sort of a “roll your own distro” approach. It lets you take features from wherever and combine them. It’s perfect for anyone who finds themselves distro hopping.
Ive had horrible battery life in my 14 pro since 16.6.1. Just installed 17 yesterday and it still seems at least as bad.