Azure Blockchain followed suit, shutting down in September 2021. [1]

[1] https://cointelegraph.com/news/microsoft-quietly-closing-dow...

No. I don’t really follow them closely, I just thought their marketing page was a good list of possible use cases.

The article did a good job explaining what general problem blockchain solves, but didn’t give me a very good idea of what problems one might try to solve beyond existing implementations.