This is a major version bump from 1.5 => 2.x, so expect incompatibility:

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

Known incompatible packages:
- griffith
- python-fastapi
- python-aws-xray-sdk
- nominatim
- python-beaker

(Unless I missed something or they are easily patched)

I'll likely upload python-sqlalchemy1.5 for those packages later. Lets first rebuild the other packages :)

EDIT: ToDo notes at https://md.archlinux.org/8xoVuWxjSb2H5aNdx_Y0SQ#