I've heard a lot about these systems, and, if they do what they promise, I think this is great. Exactly what is needed. I already do package and distribute my software. My comments are mostly directed at those who have a problem with those who don't, because that's a fine choice too. It can also be a fine choice for awhile. The problem is mostly one of attitude, we need less user entitlement re: packages. Packages are something I will get to if I want to, when I have the time, and if it interests me.
I would note there are other problems with the package manager ecosystem which make it ill-suited to packaging Rust apps, for instance. I am not an Arch user, but Arch really is leading the way here: https://wiki.archlinux.org/title/Rust_package_guidelines