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These all seem to be super-niche or obsolete though? * ATMA, ISDN, NIMLOC, EID, X25, are all for relatively niche or obsolete physical layer protocols (I guess ATM isn't that niche, but most people never run into it). * WKS, PX, NID, LP, L64, L32 seem to be defined but unused in practice (I had never even heard of ILNP, which what NID, LP, L64 and L32 are for, until I googled it just now). * RKEY, NINFO, MINFO and several others are expired without adoption or never made it to an RFC * GPOS is an earlier version of LOC |
Yes, I wrote that in an edit soon after commenting; your comment was made hours after I made mine, so you should have seen it.
And, as I said, the SPF record, though obsolete, is still very commonly found, in my experience.