I recently started using Fedora with btrfs, which I think was the default on install. So far all I’ve noticed is that backups and restores are really fast and easy.
Are there any important things to be aware of, like speed, drive lifespan or energy efficiency?
Regular btrfs scrubs is a good idea to detect data loss/drive failure early. I have a monthly sytemd timer run it automatically.
Btrfs balance can also free up space but I don’t run it regularly.