Your reductio ad absurdum is not particularly convincing. I draw the line at exactly the BaaS layer specifically because of the high risk of these providers pulling the rug out from under you.
If you disagree, fair enough, but I feel pretty bad right now for the poor developer who decided to adopt StackMob, then migrated over to Parse when StackMob shut down, and now has to migrate once again. Fool me once...
You'll move that line eventually. Datacenters were a hard problem to solve a decade ago. Now its (almost) trivial. Virtual clouds were a buzzword less than two years ago. Now they are huge and successful businesses. Same path for BAAS.
