I don't know how you can look at Leica's history with FF cameras and say that.
Their entire (modern) brand identity is a higher-cost item with exclusivity and price premiums to go along with that. The M cameras were all outclassed in technical specifications by pretty much any camera, at half the price or less. The M9 I own I would readily admit is probably not much better than an entry-level DSLR except in good light, and of course has 1/10 the "features" (which yes, are superfluous for most).
Now maybe if they extended the Digilux (or Hasselblad 🙄) model with a FF Sony rebadged as a Leica camera, it may happen. Hopefully sans wood trim.
I don't really understand how the Q is "about economics." If they even extend this idea into an interchangeable lens mount, with AF lenses, then are people really going to be persuaded to switch systems? I don't think so myself, not when DSLRs still dominate the marketplace in most areas (hobbyist, amateur, pro, etc.) and other mirrorless offerings are more mature, way cheaper, and probably offer 95% of the "user experience" other than the prestige of the Red Dot.
The other idea would be a Q with an M-mount, so no AF. Which means we are back to a scaled-back M240 with no RF and a built-in EVF? Is that what people want, here or elsewhere? I think very few people are going to switch systems to a mirrorless camera, even if it came in at $3k, with manual focus lenses, which then cost more than most mid-tier FF cameras themselves. Zeiss/Voigtlander offerings might help but still. The average camera buyer won't spend that kind of money, the serious amateur or hobbyist will gravitate towards systems that have 95% of the performance at 50% of the cost, and the pros will be wondering where their 70-200mm and wide or midrange zoom is, not to mention the 300mm f/2.8. So we are back to the niche club that bought the M9/240/Monochrom I guess.
To end this on a positive note, I recently read that the Q has a leaf-shutter that of course offers major benefits for flash sync. That, in my opinion, is the only interesting thing about this camera. An M-mount camera with a built-in LS rather than a FPS would be, for me, quite interesting.