Really? With the exception of Office I can't think of a single microsoft product that could ever be considered "good". They have consistently crapped out sub-par products for decades. It would be perplexing if they could actually get any IM software to a good state. This is their 3rd one. They even bought arguably the best one in the world (Skype) in 2009. Which was "coincidentally" the year that Skype usage fell of a cliff.

Have you never used Visual Studio or VS Code? Would you consider C#/.NET or TypeScript to be products? Having worked with various developer-centric tools across Windows, MacOS and Linux for the last 20 odd years, if I ever felt MS consistently dumped sub-par products on its userbase I'd happily walk away and use alternatives. Teams is one of the few of their products I regularly resent being forced to work with, and would never recommend it if I were in the position to (and yes, Skype for Business would be next on the list).

Okay I concede that Visual Studio is also good.

VS code is another crappy electron app. Why anyone would want to use electron for a text editor is beyond me.

C#/.NET are crap. Especially .NET. And a programming language that is not cross-platfrom is a joke. I know they have made some efforts to get it to work on other OS's but those are just as crappy as all their other stuff.

Nothing wrong with typescript, but I don't really see it as any kind of innovation. It's just JS with some guardrails.