Given that Firebase hasn't shut down yet, and they just announced Firebase Cloud Functions and stuff, I think that is a pretty strong sign of healthy growth. F

Given that Firebase hasn't shut down yet, and they just announced Firebase Cloud Functions and stuff, I think that is a pretty strong sign of healthy growth. Firebase (and Rethink) are some of the bests out there, and like Slava said about license concerns, why worry about what might happen... when using these systems let you avoid worrying about a bunch of painful things NOW? I'm still the type though that prefers to use Open Source tools and not have vendor lock in, though. That is why we're building https://github.com/amark/gun https://github.com/amark/gun which I often describe as an Open Source Firebase. The goal is that it is self-healing (P2P architecture) so you don't have to worry about DevOps either. Recently we ran load tests on low end hardware doing 2K table inserts a second across a federated system - and we hope to get this up to 10K table inserts a second on a free Heroku instance (if this is physically possible). That said, use tools that make your life easier NOW, be that Firebase or not - the future is always going to have its own challenges.