Well, there is a general thing where small companies build a thing, and then they scale to the point where the thing doesn't work any more, and they have to mak

Well, there is a general thing where small companies build a thing, and then they scale to the point where the thing doesn't work any more, and they have to make some changes. History has taught me that accepting the inevitability of change is far better than trying to build a thing with so many features that it need never be changed. In this particular case, I find it hard to believe that anybody will be "locked in" to a serverless SQL database in the same sense that, say, being a game company on top of iOS "locks you into the Apple Ecosystem," or writing your app in Rails "locks you into Ruby."