See, the problem is that the people running these projects specifically don't want people making or using cart backups. They push the "install" option and pretend that enabling people to install a game is at all different from enabling people to play load cart backups without installing. Maybe on the 3DS it eventually made sense for most people considering the size of the games compared to the size of SD cards, but on the Switch? No way. If SXOS never updated again you would STILL have people using it years from now unless a viable alternative came around.
Plus you have people using hard drives which Atmosphere doesn't support. I'm not one of them, since I don't own enough games to need that (yet) but for those that do it's an option they actually need.
I'm holding out hope as well, but with their sites keep going down it's not easy. Their forum was down for a few days while their download site was up, then the forum came back up for a day and now both are down. My guess is that someone is still maintaining it, but it's clearly infrequent. Like, they aren't even actively monitoring their own domains. That suggests that they are unplugged.
In addition to what others suggest, I would change DNS settings on the Switch and ALSO on the router to
block Nintendo updates.
Can anyone confirm if these DNS settings still work? I asked a question about it last week, but the only response was from a troll who only responded specifically to go off topic and suggest that people shouldn't be allowed to have two different questions at the same time each with their own threads. Anyway, blocking the DNS settings should help prevent the updates if things haven't changed.
DNS: 104.236.106.125
Secondary DNS: 62.210.147.20