The interest is there. The product is good. The only thing needed is the desire to demonstrate and the opportunity to do so.
This. Demoing is good, but in some ways, it needs to go beyond
just demoing; positive
and organized publicity of almost any type would be helpful. Having things like the
Explorer's Edition or the
Merchant's Edition with their one-dollar price point is good; it means a low (negligible) barrier to entry, and provides openings for two character types that would "call" to a big chunk of the SF gamer types. Some adventures to support them, at the same price point, even if they're just "re-stats" of appropriate Classic
Traveller adventures, would also be good.
But the key is to
get the word out - what would be the effect on
Traveller if, for example, someone were to come to GenCon, run a
Traveller adventure in every session, and give everyone who played in the adventure a printed copy of
Explorer's Edition or
Merchant's Edition as a 'swag freebie'. It would take a fair bit of disposable income to pull off, and the person doing it would need to pre-arrange a blessing from Mongoose to do it, but it would put
Traveller in the eye of a community that needs to be reached. Doing this at TravCon (UK) or TravellerCON/USA would be welcomed, but it's also "preaching to the choir" - the attendees are, for the most part, people who already are "on board" with
Traveller, and thus aren't really increasing the "uptake".
Suppose that Mongoose were to sit down with Sharon Lee and with Baen Books to get permission to write an Adventure in the Liaden Universe® for
Traveller, and perhaps put out a "dollar edition" of the rules customised for that adventure, and then advertise it through Baen and through the bookstores that carry the Liaden books. That's reaching out to a fandom which might or might not be into TTRPGs - but you've got a shot at catching the ones that are still "on the fence" about it, because now they've got a way to
participate in a small way in the universe that they love reading about. Sticking with Baen as the publisher, there's also David Weber and the Honor Harrington universe or the universe of Empire from the Ashes; the estate of David Drake and the universe of the Republic of Cinnabar Navy, the James Schmitz estate and the Federation of the Hub (Telzey Amberdon, Trigger Argee, et al.), and so on. And maybe there are other publishers and authors that might be likely targets for similar ideas.
The
Babylon 5 material for
Traveller was a good idea, but it was never followed up on. The attempt at
Traveller: Prime Directive had the same potential, but never came to fruition, and its time may have passed - a
Star Trek: The Traveller Edition may be of interest to the existing Traveller community, but with the other
Star Trek TTRPGs out there, you'd have to sell on the basis of the system - and that's exactly the problem; the system isn't as well-known as it needs to be, and still has some tropes associated with it that are not complimentary.
That's what need to change, and the best way to do that is to get it out in front of the people who you want playing it.
Word of mouth from fans is good and useful. Demoing at FLGS is good and useful. But more is necessary.