I just wanted to point out that you pretty much can just tarball your user directory and drop it into a fresh system. If you embrace the Flatpak and container-based workflow, it's incredibly easy to be up and running in no time. Obviously, containers and flatpaks aren't unique to image-based distros, but are perhaps less common in traditional distros.

Sure, you'll need to add a printer back, or reconnect to wifi networks, but your user and/or dev environment will carry over, and with a couple of commands, any package overlays and flatpaks will be reinstalled and ready to go.

I found flatpaks and containerization to be the only real learning curve with Silverblue, and only because I hadn't used them previously. Compared to the learning curve and unorthodox approach of NixOS, Silverblue itself is as easy as using vanilla Fedora Workstation.