It seems mostly a lack of understanding on my part.
I have a quite customized Debian setup (Ansible script grown over 10 years now), much more elaborate than just installing a handful of packages from the default repositories. With Ansible, I figured out how automate all but everything, setting up one of my desktops is typing one command, getting a coffee and stuff just works.
For Silverblue now, it looks like the way to configure/use it is a mix of rpm-ostree, overlays, installing applications into toolbox containers (and moving their desktop files to the host system) … in theory, it sounds like a very nice separation/clean, in practice it sounds like a lot of work to arrive where I am right now with Debian.
So… my big question: Has anyone using Silverblue an elaborate custom setup and an easy way to automate it to create cattle… or is Silverblue more like a pet thingy.