I was on Mastodon for more than a year and loved it: great conversation that reminded me of the hope and promise of the Internet in the late 90's. Then my instance admin went AWOL, the site crashed, and all of my data and social graph were lost. I still can't get the admin to respond to emails. I could host my own server but who really has the technical know-how and time to do that kind of work? Mastodon has got to solve the reliability and/or portability problem. If I could have recovered my social graph on another instance, I would still be on the network.