I ran Fedora Silverblue for the past few months. The selling point that convinced me was that the system you install is the exact same the developers use for testing.
I also hoped it would just update itself without any intervention. And I was fine with default Gnome and Flatpaks.

My experience was that it actually offered no real world benefit. Arch had fewer visible bugs. It crashed a few times, in a way that the only way out was cutting power. The auto-update didn't work, I still had to manually check for updates and click "install", and every update requires a reboot. Sometimes it needed 2. Video streaming was jerky even in the flat hub version of Firefox.
And it's pretty limiting: Many command line tools I'm used to were missing, even Gnome Tweaks was missing (WTF?). Of course I could "layer the image" and alter it to include what I need, but that defeats the entire purpose. And system tools don't work well in containers, either.

There's basically no in-depth documentation on how to do stuff that is standard on other distros but now doesn't work the same due to the immutability. And it had just too many inexplicable quirks to use it as a zero maintenance grandma OS.

I switched back to Debian. Installed just the minimum required base system, the minimum required packages to run Gnome shell, and got all my software from Flatpaks. It looks basically the same, is more stable and bug-free, and I can tinker on the command line if I feel like it.
I made an

alias Upd="doas apt update && doas apt dist-upgrade && doas apt autoremove --purge && flatpak update"  

which is so much faster than using the gnome software center.