When is the .net pace of change going to slow down, or the length of time to support a given .net version going to increase?

Now that .NET has begun to stabilize (and we're getting close to .NET 10), I'm finding that organizations are having a hard time keeping up with the release versions of .NET - 3 years isn't enough time for them to develop and place into production only to find that they're almost out of support.

Is there going to be a time when a .NET version will be supported by Microsoft for a longer period of time, say 6 years, or 10 years? Or the pace of new versions be slowed down to one per every 2 years or something like that?