[rbanffy]

One thing I like about GAE is that it encourages good practices. Many people cut their high-scalability teeth on it.

[bduerst]

Right, but when you rely on other services that that haven't cut their teeth yet, it becomes a problem.

For example, if you're pulling 50 MB from an API that doesn't allow multi-part downloads, you can't do it with GAE because they have a 32 MB limit per connection.