First time here so please excuse any mistakes, but wanted to suggest including snapper-gui on system rescue’s image.
The way Debian’s installer names a btrfs root subvolume is incompatible with timeshift which expects the root subvolume to be named @ while Debian names it @rootfs so timeshift won’t recognize it - it’s not possible to restore a snapshot of the root subvolume with timeshift.
Anyway, I know resources are limited so this may not get the love it deserves, but I did want to thank the devs for an outstanding product.