Thanks!
Bookmarks and passwords are taken care of. And for the apps I'll try to get migrated to flatpaks as many as I can while still on original system.
I also see that full disk encryption is being recommended a lot, and I don't have any solid reasons to encrypt only /home.
I have not given much thought on Silverblue. Is it "flatpak-only"? If so I'll need to go through my apps to see if that could work. And my backup strategy will need to change - I use Duplicacy that is not available as a Flatpak
St. Petersburg's and Moscow's old stations were built to show off superiority of communist state. That's where you can see lots of polished stone, sculptures, giant golden light fixtures, stained glass, etc. Focus was not on the people. Then starting around 1970s the stations were built with much more utilitarian design. Modern stations built in Moscow in last decade or so look very nice though.
NYC subway is just gross. I guess they are seriously underfunded to afford proper cleaning and renovation