4-Byte AS Number soon to come?

In general, you're right; however, BGP documents have a special status.
Because of how crucial BGP is to the Internet's functioning, I-Ds won't
progress to RFC status (at least as Proposed Standard) without two
interoperating implementations. For everything else, you're right.

    --Steven M. Bellovin, http://www.cs.columbia.edu/~smb

Ah, that makes sense. So how does that work for work on TCP (which is even more crucial than BGP)? You have to have interoperable implementations before writing the draft?

(I knew the IETF had some trouble with its internal organization. I had no idea it was this bad.)