This is a high level and non-exhaustive overview of the 1.15.2 to 1.16.5 migration primer from a mostly Forge oriented perspective.
This primer is licensed under Creative Commons, so feel free to use it as a reference.
Please note that this can be updated, so leave a link to this file so readers can see the updated information themselves.
If there's any incorrect or missing information please leave a comment down below. Thanks!