It's definitely bad if you can't use a service you'd like to use but one has to remember that this isn't run by someone with millions of dollars at their fingertips.
And the reason for that is simple: This service doesn't exploit it's users.
Best bet is probably to create an account on Lemmy and another on Kbin. Not only is it simply not likely for two instances to go down, but they're also different platforms, so further decreases the likelihood. And you can see all the same content.