I have been hearing out in the interwebs that firebase is not ideal for most small startup projects or small projects in general. Mainly those with not whole lot of cash to throw around. In a recent blog post a small startup explains its experience with firebase. I have also read something similar about a year ago.
I would also think this is the case for most PaaS.
I’m currently in the middle of working on an IOS app that leverages firebase for its auth, database features. Now these features are not something crazy, so I may end using a hosted solution with some node in the mix.
Just a thought.