But it's not about kubernetes. It's about simple API's becoming complicated for no reason (according to the author, I have no experience on etcd) using etcd as an example
The author doesn't detail _what_ is more complicated about the gRPC API, other than the fact that it's gRPC. One could implement the exact same API in HTTP or with gRPC; so without specific examples, it's kind of a meaningless critique.
Surely, most consumers of a database like etcd are using a client library, in which case why does it matter if the API is HTTP or gRPC?
Tangential: after reading some of the comments, I was surprised that the blog post was only like 250 words; the author really says very little.
