> Really? That seems strange, at least to me.

Are you purposely misreading the comment? Where did it say that http was the only form of communication (or even the best) between microservices? Where did it imply there weren't other methods?

> While HTTP can be considered as a transport layer for RPCs between microservices, it seems to me to be a very inefficient and bug-prone solution.

This is so irrelevant to the point being made it's nuts.