[na85]

I agree with all the points you've made, and I haven't read this RFC beyond a quick skim, but consider:

-a lot of the time, a dearth of implementations of a new Thing is not because the new Thing is bad, but simply because people are change-averse and lazy, even in the face of an objectively better Thing, and

-I still consider this a quality submission; even if CBOR doesn't get adopted it's still neat to read. It's like watching one's government draft new legislation, except more relevant.