I have a hard time finding information about the limits of App Engine. Eg Heroku has all kinds of stuff going on like connection limits and daily restarts and whatnot. How is that with App Engine for Elixir? Is this documented anywhere?

Also, why use App Engine over Compute Engine for Elixir? I understand "if you want more control" but can you elaborate about what kind of "more control" someone would want that App Engine doesn't offer?