I was hoping that eventually App Engine would be implemented on top of GCE, with all the services App Engine now provides available for GCE, and move to container‐based sandbox, like OpenShift/Heroku/Elastic Beanstalk, instead of application‐based sandbox. Especially now that App Engine has switched to instance‐based pricing.
Unfortunately, since all of this effort went into securing yet another runtime (PHP), I don’t think it will happen.
It would be great if at least it was possible to use Appscale over GCE or just the Datastore – which is by far the most attractive feature of App Engine, other than Task Queue – with custom deployment solution.
Google Cloud Datastore could deliver just that if you don’t mind paying twice:
You should be aware that Cloud Datastore has a serving component
that runs on Google App Engine, so there will be instance hour costs.