Kentico Xperience 13 will stop supporting .NET Core 3.1 in Q1 2023. I believe that most of the projects are already running on .NET 6, the latest LTS version, but for those who are still on .NET Core 3.1, I will explain what steps are needed to update your project to .NET 6, why it is important and what you can expect in regards of .NET support in Kentico products (Kentico Xperience 13 and Xperience by Kentico).