So Google App Engine doesn't fit into your thinking at all here. I know of large IoT efforts going on there though. And gaming. Both of which would make sense for Parse if Facebook were serious about it.
App Engine is far more mature than Parse - it's been around for nearly a decade, the API is stable, and Google's not going anywhere any time soon. App Engine adoption was also very slow to pick up, but it was a more enterprise-targeted computing solution than Parse.
IMO Facebook just decided to cut their losses. Parse was very likely to end up as a low-margin enterprise business with little to no impact on Facebook from a data standpoint. Facebook doesn't really have an enterprise sales division like Google does; and standing up a new sales channel like that is very difficult if you're not sure the margin will be there.
IMO Facebook just decided to cut their losses. Parse was very likely to end up as a low-margin enterprise business with little to no impact on Facebook from a data standpoint. Facebook doesn't really have an enterprise sales division like Google does; and standing up a new sales channel like that is very difficult if you're not sure the margin will be there.