Jun 13, 2019 10:16 AM|mgebhard|LINK
OWIN is a standard for adding features to a .NET application.
Current version of all Owin libraries are 3.x. How safe typically to upgrade to Owin 4.0 libraries?
We can't answer that question. You have to read the documentation for the OWIN libraries you are using. Generally the docs will tell you if there are any breaking changes.