We're not talking about "continuous delivery", this is just having a plan to ship updates every two years, on a well defined schedule. If you can't manage that

We're not talking about "continuous delivery", this is just having a plan to ship updates every two years, on a well defined schedule. If you can't manage that organizationally, there are deeper problems. It's not really Microsoft's job to work around your awkward requirements. Everything is open source, you can ship patches for .NET 6 yourself if you really want to.