A n00by PostgreSQL ORM in pure python 3.7+ which probably abuses asyncio, dataclasses & type hints - reckonsys/pgorm ...

Tortoise ORM is a young project and breaking changes are to be expected. We keep a Changelog and it will have possible breakage clearly documented. Tortoise ORM supports CPython 3.9 and later for ...

Yea, with an ORM, unless you use MySQL/PostgreSQL/SQLite specific features, your app will work on any of them.

Without going into too many extraneous details, it's all going to be Postgres-based (at least for the Command/write side of our CQRS model), Python-based, and AWS-based.