'Till you figure out that, on Arch, if you missed/broke anything, you can boot into the Arch USB, mount your root into /mnt, and arch-chroot in to fix whatever is broken
Yup, a live image works in a pinch. IMO, just use BTRFS on root and install something like snapper to handle snapshots and you shouldn’t need the live USB (unless you bork your bootloader somehow).
'Till you figure out that, on Arch, if you missed/broke anything, you can boot into the Arch USB, mount your root into /mnt, and arch-chroot in to fix whatever is broken
Yup, a live image works in a pinch. IMO, just use BTRFS on root and install something like snapper to handle snapshots and you shouldn’t need the live USB (unless you bork your bootloader somehow).