[smarx]

(I'm the blog post's author.)

Concretely, it means we emailed everyone by hand with a Datastore API app that had a non-trivial number of users and offered to help. (If anyone didn't get an email, you might only have a couple test users, but feel free to reach out to us yourself.)

With most developers who respond, we're digging into their data model and trying to suggest alternatives (possibly files in Dropbox or possibly alternative services like Parse and Firebase).