@ernie@tedium I don't think I've seen Cosmos before. I know there are some like https://yunohost.org/ or https://umbrel.com/ that are trying to do similar things, and things like Home Assistant's Green/Yellow paired up with their Addons gets us some of the way.
I've also considered what a "flatpak" of self hosting would be though the initial setup of Cosmo/YunoHost/Umbrel/etc is still probably more challenging than most would want to attempt 🤔