It's not perfect but MS has been investing in a scheme to make upgrades as easy as possible for the last five years, .NET Standard being the prime example. This

It's not perfect but MS has been investing in a scheme to make upgrades as easy as possible for the last five years, .NET Standard being the prime example. This way, we've been able to migrate our project progressively while keeping it up to date. We've been able to use .NET Core versions of libraries as long as they support .NET Standard 2.0. This is way better than "migrate fully or die".