No authority here, but it doesn't seem serious, just a bit prolonged. Kindadmin gave everyone a heads up beforehand and has kept folks posted in the cafe /shelter/ thread (horse's mouth version there), but the short version is that the host wouldn't/couldn't host anymore (on maybe a week or two's notice), so /kind/ has been down for kindadmin to work out hosting and to use the downtime as an opportunity to become a little more savvy on the tech side of things... with some other factors in play - like waiting on then starting a job with long work hours - since nothing ever goes quite as planned. Guessing that the url will be different when /kind/ returns, but it was 2kind.moe (which has been the same static image since /kind/ went down).
Other /kind/-goers seem a bit antsy but are still watching warmly in the /shelter/ thread, and they're presumably getting their imageboard fix from whatever other boards they visit. So while there isn't a bunker and while people do miss /kind/, it feels (to me, at least) like we're close to the goal and that folks are still ok in holding out a bit longer for /kind/ v4 and are getting by in the meantime.
Anyway, interesting place you have here. Thanks for the invite; i'll poke around and maybe lurk a while.