Could you please provide a short summary of what’s new + known breaking changes? Or if it’s in another thread, that’d work too
EDIT: here is a changelog thread: Entities 0.17 changelog - Unity Engine - Unity Discussions
EDIT2: It seems you can’t automatically upgrade these packages. In 2020.2 I had to manually re-add the packages from git-url for them to upgrade. details here: Visibility changes for preview packages in 2020.1