We have considered this. We really liked what heroku did with their postgres service, especially the 'followers' feature. Considering hasura's core principle is not to reinvent things, we really want this integration to happen. However there are few technical challenges before this becomes a realistic option.

1. hasura-db requires few custom extensions (written in c) to be installed into postgres which is not possible in heroku's postgres.

2. hasura-db also makes some assumptions about authentication which is handled by the hasura platform.