Version 2 brings a lot of changes, and it would be very helpful if as many people as possible test the beta to help in fixing issues before the official release.

You can install with pip install SQLAlchemy==2.0.0rc2

What's new: https://docs.sqlalchemy.org/en/20/changelog/whatsnew_20.html
Migration from 1.4: https://docs.sqlalchemy.org/en/20/changelog/migration_20.html
Changelog: https://docs.sqlalchemy.org/en/20/changelog/changelog_20.html