If you base your company technically on something you cannot swap out then you need to calculate in the risk that you vanish before your time has come. Which is why, bad Chef code aside, Walmart (<a href="https://github.com/walmartlabs" rel="nofollow">https://github.com/walmartlabs</a>) is a big company and knew to write a common denominator over cloud hosters to make sure this doesn't happen to them. If you picked Parse (but of course also Firebase and whatever else that is only cloud based or too expensive to ever run on premise) to base your company on, you have an x% chance of being destroyed overnight. That x changes and it is your job as a business owner to keep re-evaluating that x and keep it close to 0 where your resources allow it.