ReiNX or SXOS are just "copycats" of atmosphere, whit aditional features but a little bit outdated, atmosphere is the way to go if no playing backups, sxos is the way to go if playing backups, reinx in this moment is not really the way to go as you can do everything reinx can do in atmosphere, but more stable
Except that couldn't be FARTHER from the truth. ReiNX is not a "copycat" of Atmosphere. Sure it uses Atmosphere as a base but it's much more. As for stability it's super stable. And who said Atmo can't run backups? If you have the sig patches of course it can run backups. Also ReiNX is not outdated, just recently an update was made that made it compatible with the latest OFW, something that not even the "almighty" SX OS has accomplished yet