I think Google sort of deserves some negative press after the major datastore problems of late (now fixed), but it's not reasonable to criticize the app engine

I think Google sort of deserves some negative press after the major datastore problems of late (now fixed), but it's not reasonable to criticize the app engine platform itself. The so-called limitations are just reasonable trade-offs, and frankly they are less annoying than many that teams end up self-imposing in order to work around unexpected bottlenecks in their app.