True. Joplin’s been around for a while, though, and the dev seems to still be pretty active–and again, if he gets weird, someone else can always fork the code.
What’s kind of interesting is that the server code is at 2.2.x, into a second major release, and is still considered beta. But still, it should be pretty straightforward to install; I’d expect the instructions I wrote up for Peertube using Docker to be a pretty good starting point: