I think there are some developers who would consider .NET 5 a huge breaking change. .NET (Framework) 4.8 looks like the predecessor but has features (rightfully) not available in .NET 5.

I like the vision but hate the name. .NET Core 4.0 would have done it. When you market software engineers stick with patterns. This looks like a lot of managers have feedback to stuff they did not understand in the first place.