I’ve seen one service per database table, and have had architects seriously think that a table equals a bounded context. Then they try to work out how to do two-phase commit across micro services.

I'm on the same boat.

"Previously product teams would have to call numerous downstream services to leverage a domain; they now have to call just one....Furthermore, we were able to classify 2200 microservices into 70 domains."

So they went from 2200 to 70 microservices? One extreme to the other. The answer is somewhere in the middle.