Just a friendly reminder to any .NET dev: Upgrading from .NET Core 3.1 to .NET 6 should be painless. Flipping the target framework in your csproj file to net6.0 should be all you need to do. The only things that could be potentially affected are dependencies, but even then it’s pretty painless.
I’ve been staying on the standard/current track since .NET 5, so upgrading every release since then has been very painless for me.