A little sad, if it deemphasizes .net. I hope the Core transition doesn't turn into a boondoggle, though I'm afraid; it's taking a long time to reach parity with where the full framework was. The history of major language rewrites is not overly encouraging.
Working in C# on .net 4.5-4.7 is such a tremendously productive platform.
BUILD 2018 was full of .NET goodies, including .NET Core 3.0 roadmap with Forms/WPF/UWP/XAMLDirect support as the main goal.
It appears it is the usual political issues between Microsoft divisions, which I thought had gotten better after all the re-organizations that took place.
I wouldn't be surprised if this JavaScript everywhere wasn't yet another way Microsoft is trying to appear cool among the Google devotees crowd, like how they are jumping in PWAs as well.
Working in C# on .net 4.5-4.7 is such a tremendously productive platform.