Office is React, because of C++.

Office and WinDev teams are the main reason why Longhorn failed, their collaboration with DevDiv wasn't particularly stellar.

They were pretty happy to redo Longhorn ideas using COM instead, then rejuvenating it into what is now UWP, naturally creating an incompatible .NET stack in the process, which might finally be done with when .NET 5 gets released.

Also Office team is so deep into C++ they even maintain their own VC++ branch.

You won't see those guys touching anything .NET beyond the absolutely necessary.

Officially it is no longer an experiment.

Otherwise I agree. Blazor will never be what they imagine it will be. And why should the office team migrate to another tech stack. That is wasted money.

When I see how absurdly complicated these front-end JS frameworks are it makes me really hope that Blazor can deliver. But for some reason it also feels similar to times in the past where a word for promising tech was never more than a word. But please work, I don’t need or want two routing implementations and an entire MVC stack to manage on the damn client...

I've now done two small client projects in blazor(server side) and it's amazing for small to medium sized cruddy apps with a small user base. I

On the fist project I was able to build out small apps almost twice as fast as react. And this was with 1 day of previous blazor experience before the first project.