A few related questions: what is the biggest difference between Core 3 and Framework 4.8 in terms of APIs? Superficially the difference was desktop and a few other areas. Is there a reason to keep both branches of the ecosystem if the API surface grows ever more similar?

Second: is the goal of Core 3 to be “feature complete” for the desktop APIs in the sense that existing .NET 4.7 Windows Forms apps (for example) should work without change in .NET Core 3, or is it a less ambitious plan initially?