I started on a small instance that fortunately gave a heads up when they decided to shut down. When I moved to a second, small instance where I ported all my community subscriptions, it shut down with no warning. It’s a shame, because both instances were topically-focused and small enough to avoid defederation drama.
I love the idea of decentralized infrastructure, but now I’m on .world because I just don’t have the time or willpower to move every few months, and I definitely don’t have the wherewithal to run my own instance.