We're working on suitable replacements for these services. In some cases, e.g., Cloud Tasks, we're pretty close. Others will take a little longer. We'll share updates as we make more of these services available.
Also I did find that someone wrote a ndb-like wrapper around the cloud datastore API.
https://github.com/Bogdanp/anom-py
I haven't tried it out yet.
Although i think any reasonable path to upgrading to 3.7 might need atleast some wrapper like that around the datastore(even if it's not 100% compatible), otherwise forcing people relying on that to re-write the entire data layer. At this point i might just start re-writing the app, to move to something with less lock-in like Mongodb. But i'd love to hear what other people's plans are for this.
Also I did find that someone wrote a ndb-like wrapper around the cloud datastore API. https://github.com/Bogdanp/anom-py I haven't tried it out yet.
Although i think any reasonable path to upgrading to 3.7 might need atleast some wrapper like that around the datastore(even if it's not 100% compatible), otherwise forcing people relying on that to re-write the entire data layer. At this point i might just start re-writing the app, to move to something with less lock-in like Mongodb. But i'd love to hear what other people's plans are for this.