My impression is that once the Astral Plane opened up, there's enough academic reason to want to encode those glyphs as there are certainly some really interest

My impression is that once the Astral Plane opened up, there's enough academic reason to want to encode those glyphs as there are certainly some really interesting academic work already using Klingon glyphs or Tengwar or others (I don't know if it is more or less than say Linear A, but it's not a contest), and we do risk losing some of that academic discussion if it isn't reliably encoded in something like Unicode. Academic papers are very clearly carved out in copyright laws as "fair use". Unfortunately to protect fonts as copyrightable a lot of the similar carve outs that should make any and all Unicode encoding of glyphs "fair use" are something of a swiss cheese at the moment, and yeah I don't blame Unicode for feeling that their mission definitely does not include fighting the definition of what should be "fair use" in most of the world.