> When it comes to web, MS has been focused on ASP.NET since forever.
What's your definition of 'forever'? Are you talking about ASP, or ASP.NET, or ASP.NET Core? Or, Web Forms, MVC1, MVC2, MVC3, Silverlight, 'minimal APIs'? ...
Honestly, it's just one clusterfuck after another.
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EDIT: There's a number of sub-comments here that seem to be missing the point. So, I'll expand here:
* For those who are questioning my right to have an opinion on this and doubting my expertise: I have used .NET since version 1. I founded a company in 2004 and have been responsible for building an enormous web-app product in the .NET world (since before jquery era, basically). I've seen all these frameworks come and go.
* For those who are saying "whatabout JS". Am I not allowed to have an opinion on the ever changing landscape of .NET web-app development without first criticising the 1000s of open-source developments?
* For those saying they've done migrations in the past. I'm pleased for you. Now try it with an application of over 500 pages when you have other things to be getting on with. Especially if you're not eager to jump to the latest and greatest every time a new one comes out, then you have a big problem of jumping multiple steps. Or, especially when they rip the entire ecosystem away (.NET Framework → .NET Core) meaning a big fix-up job for those migrating. I'd love to know what the collective economic impact of MS changing their minds every few years is.
But, finally, this is not about migration per se. This is about the poor quality of the frameworks themselves. Microsoft just follow the latest trends once they get going and then build half-assed versions that try to completely lock you into their world. They try to destroy everything that is the web so they can stop you leaving their ecosystem. This has profound problems for the consumer of these frameworks when MS drop it and go after something else. The Minimal APIs is a good example of bandwagon jumping, they've seen the trends to more functional-style APIs, and then they go and implement it in a horrible half-functional/half-OO ugly way. There are so many gaps in it due to its design that it's already obvious that it won't last (in its current form at least).
In 'JS land' it may not be the prettiest of ecosystems to work with, but JS written 20 years ago will probably still run today. Frameworks written 20 years ago can still be used. Support may go away, but that doesn't precipitate a rewriting of your UI layer. Anyone developing software for the long-term, which is professional software houses, should be wary of relying on anything MS build (outside of the language itself and its tooling, which is excellent).
Personally, I'd never bet the house on a MS web framework again. We ended up rolling our own, which was much more advanced than most web-frameworks (at the time) and stayed written (well, until .NET Core came along!).