RE: Microsoft

1) MSFT has already used React for far longer than 2 years.

2) They have basically never used the technologies you mentioned (WPF, Silverlight, WinUI). They offer them as UI toolkits that run in their Windows environment and that’s it. Their failure to market and support these technologies is independent of what they do for their own development strategy.

3) They bought GitHub and effectively own electron now. Many of their biggest apps are on electron (Teams, VS Code, Azure Data Studio).