Tab Stash. Don’t need nor will ever need anything else.

I much prefer it over grub. I don’t think there’s any other bootloader’s that support btrfs snapshots.

I think flatpaks are good. The performance penalty for containerized software can be felt much more when you’re not using a good CPU. So containers do not “solve” my use case.

Could you pass me a link to an example setup?

“subvolume - cannot be snapshotted if it contains any active swapfiles”

Make a subvolume only for the swapfile.

has a chance to fragment

This is true for all files. Is it a bigger problem for swap?

has issues with hibernation (that I’ve personally encountered multiple times)

This one I can’t refute. How long ago did you have these issues?

Mount options also only take effect on the first mount of the device. Since it looks like you only have 1 btrfs device - only / needs the options, really.

I didn’t know this. Thanks!

Yeah it’s supported. It’s listed in the docs for btrfs and arch.