I previously worked at Microsoft in an unrelated area, but had a friend who worked on CosmosDB, and later a different part of Azure.

There are some Microsoft products I genuinely love, but some are terrible. To an extent it is a reflection of the inconsistency in internal teams. Culture, values, skill level, and quality bar are all over the place depending on who you talk to, even compared to other large companies.

From what I had heard, CosmosDB was not a healthy team, and I would not consider using it as a product.