Same gag, pretty much, year after year. What does this say about T5?
I said long ago that what T5 needs is for Marc to hand the whole gigantic mess over to someone who can cull a playable game out of it. At present it's just an ever-spreading morass of tables for this, that, and everything else.
It would probably be posible to take the core of T5 and make a good (simple and playable) game out of it, then build the rest into a range of supplements to cover all kinds of things. There's already enough there to fuel a very, very long string of supplements, and if Marc wants to continue codifying every possible thing then he could get on with that while the actual game is being produced.
This would need the services of a writer who can turn the dry table-fest that is T5 into a game that today's generation of gamers would want to play. At present it's only likely to appeal to die-hard fans who want it because, well, it's Traveller.
I don't believe that T5 in its present form (even if it were actually finished) has any appeal beyond a segment of the existing fanbase.