I don't know much about how this camera is priced, but I think you're underrating the human desire for exclusivity. I won't be surprised when that first run sells out.
> the human desire for exclusivity
I sense some resentment for people with money.
Personally, I don't find it hard to imagine at all that there's 350 photographers who whom $4000 is not a big deal (many of them on this site), who are looking for something interesting and new.
For reference, a new Leica film camera body is ~$7000, and another $500-$2000 for a lens. Lecia is sort of the Rolex of cameras - obtainable by "normal" people, but it takes strong desire to do so (vs going on a really nice vacation or whatever).
So by that measure, this is in the ballpark. It's a niche product, you'd have to be really into film photography, want a panoramic that uses 35mm film (vs a 6x9 or 6x12 medium format camera).
On the flip side, if you want to get something similar on a budget, you can 3d print a body and get a used large format press lens for <$2000 all in. But, that's far more on the tinkering/project side of the market, where the Widelux is very much in the luxury end.