I've always been curious about SilverBlue but found many papercuts, especially related to code editors / dev environments and other issues with FlatPak that are still not solved (e.g. mDNS host resolution not working inside FlatPak apps).

I'll be interested in having a look at this one over the next few months as it seems to have some out-of-the-box solutions for many of those, and a lot of thought/effort has been put into it for the past 2 years!