Then Table-Top D&D is effectively dead. I'm all for letting Neverwinter, Sword Coast Legends, and other digital content run with the D&D name, but I don't want at the exclusion of a thriving game. Two modules a year is not thriving, its legacy support.
You're defining "thriving" by what you personally would like to see produced for the game. If those twice-annual adventures are selling more copies than a more saturated product schedule, and serve as a helpful launching-off-point for new players' first D&D campaigns, then I would argue that the game
is thriving, even if I personally don't see any need to buy the adventure paths myself.
I don't care about their adventures, I tend to make my own. I own the Core books and DM Screen. I even have the starter set. WotC is effectively telling me "Great! You bought all the D&D stuff we can sell you! Have fun with it until 6th edition!"
If you're not an adventure path customer, I think that that is essentially what WotC is telling you, yes. Although having moved their focus to the larger D&D brand, I'd be surprised if we see a 6E anytime soon. They seem to want D&D to be an evergreen game, like Clue or Sorry! or Connect 4. Those games don't see frequent rules expansions or updates, and sell just fine. Hasbro seems to be banking on the idea the 5E will as well, especially if there are video games, movie blockbusters and children's toys to keep D&D relevant and appealing to future generations of gamers.
I love 5e. I think its the best edition we've gotten in a while. I don't want to see it fall to neglect with only a twice-annual AP as its only support. If that's what TT D&D is, than perhaps its time to pack the whole thing in.
Again, "neglect" is certainly a subjective matter. You might leave the game in disgust with the lack of continued support. That's your prerogative. But as I don't share your disappointment, I'm saddened to read suggestions that it's better to do away with D&D entirely than support it at a rate I'm quite satisfied with. I'm not particularly interested in APs, but I'd still love to see a new Unearthed Arcana article once a month or a free Player's Companion PDF come out twice a year rather than see the whole game shelved.
I think the definition of 'enough' has likely changed by now.
Oh, absolutely, but they still have that sales data, so they have a rough idea how much return they'd see on such a product if they were to release one now. If they don't put one out, it's because they've come to the conclusion that that return isn't the best usage of their limited budget.
And that's the problem, right there.
We differ over whether there is a problem - personally I've no problem waiting a year or two for them to playtest and compile the Unearthed Arcana material into a hardback release, as I have plenty to play with until then - but since you're the one who thinks it is a problem, what's you're proposed solution?
You've been placed in charge of the Dungeons and Dragons tabletop RPG line. Boom. You have a limited budget granted you by your corporate overlords (your predecessors failed to bring in enough earnings to justify giving you more), and you have enough to maintain ~15 staff (half of which currently work on non-tabletop licensing related projects) and put out Adventurer's League content and, say, 3-4 hardcovers a year. If you're successful, maybe you can convince the suits upstairs to up your budget in a year or two.
What do you do?