Hi, thank you for admitting in your first sentence you're not qualified to comment on the subject at hand, yet felt compelled to share your two cents. Here's the context for your totally uninformed opinion:

I was a major contributor for etcd 2.3-3.2 at CoreOS. The people who extended etcd to support gRPC included the original etcd author (hi Xiang). gRPC support was necessary for good performance; we had benchmarks to justify the decision. Likewise, v3 brought about a key-value model change that was incompatible with v2 to better support binary data, ranging over the keyspace, transactions etc. A v2-style gateway for v3 with a pretty JSON API was planned but never completed due to lack of resources; the ugly gRPC json gateway turned out to be good enough for most people. Similarly I wrote a proxy to run v2 requests over v3 instances, which does support the v2 JSON API. This isn't as if a new group of people showed up and ruined the software without caring about existing users. None of us were "Xooglers".

It seems what you're proposing is what the author both argues against and wrongly believes is what happened. We constantly pushed back against k8s influence. If we didn't, etcd would be a k8s sub-project right now. I'd also like to point out that removing the people who do the difficult work of actually writing the software from the decision process is incredibly insulting and devalues their labor. How dare you.