I also used to use void-linux for many of these reasons(after arch for a few years). But i have now moved to nixos. It offers me the benefits of replicating system setup(i don't backup my system folders anymore, just my homedir and the nixos configuration files), cleanly removing system-wide packages(no more stale config hanging around) and of course the benefits of using nix for isolated/reproducible builds.
I’m glad you posted this again. I remembered you posting this a week or two ago, but when I got a chance to look into it I couldn’t remember which article or what the name of the project was. I’m a fan of the style of NixOS, and also a fan of Arch, so this is a must-try. Thanks!