In case it helps: At install time I created a swap partition the same size as my RAM and a Btrfs root partition. Then after install I ran
"yay -S snapper-support btrfs-assistant btrfmaintenance"
Then after install I enabled the maintenance scripts with defaults in the btrfs-assistant GUI and that was it. It takes snapshots when installing stuff and I can do a roolback to a snapshot in btrfs-assistant GUI or Cli (requires an immediate reboot).
One snag: If you installed it with Grub instead of systemd-boot it will show booteable snapshots in Grub but I don't know how roll back permanently if I've booted into one as it uses some sort of overlayfs. So I don't use this feature.
I wish EOS did all this as an install option though.
I've used Linux in various ways since the nineties and know it intimately but I don't want to fiddle with an install. When I got my new laptop this year I appreciated being able to plug in an EndavourOS flash drive, click on a couple of things and then let it install a sane default with prop NV driver already setup while I made coffee. I was ready to play games from my old Steam lib SSD in 20 min.
I don't know if the Arch installer is like that but EOS is slick.