drpm files on Fedora 25+ spring to mind, along with jigdo and zsync (Debian, Ubuntu - for full isos). I'm sure they will get there, but then perhaps different i

drpm files on Fedora 25+ spring to mind, along with jigdo and zsync (Debian, Ubuntu - for full isos). I'm sure they will get there, but then perhaps different installs have a different set of files that need to be replaced?