I'll keep an eye out and comment back if I notice anymore 500 errors. They were absolutely rampant over the last few days, but things seem all right currently.
It's funny you mention "if anyone is still using this server" because of the technical issues. I would hope anyone coming to Kbin in general has their anus prepared for technical issues given that it's an early in-development site, as you say.
This brings up a good point about the Fediverse, and how there'll be different perspectives on it. I'm sure some have jumped ship because other instances are operating more smoothly, but from all your hard work, correspondance, and word of mouth from other Fediverse users I feel like I can trust your integrity and willingness to get the instance to a good place.
I'm willing to wade through technical issues a good deal because I feel that unless you throw in the towel, you're gonna do what needs to be done, and that even if you did throw in the towel you'd keep us posted and that your reasons would be genuine. It's like the difference between working at a large, stable company with faceless, questionably motivated masters, and working at a small, independent company whose future is not guaranteed, but you can understand the scope of what's going on, and are able to openly communicate and understand your employers all the way up the chain.
I'm extrapolating all of this purely from not very much information, and I could be wrong, but my gut feeling says that I can trust your captaining of the ship, hopefully others feel the same.