To further illustrate:
This subforum, in the years of its existence, is only 8 pages deep. The second oldest post is by me, in 2016, shortly after it started, right when I was beginning to detect the moment of "peak fat" and the eventual downturn, yet when I was also contemplating building up a winter ride of my own.
After that thread, I did build one, and now live in a cycling environment of diminishing parts and tire choices. I feel like the 6 years I've had this bike have been the long, slow, twilight. When the tire manufacturers (tires being the raison d'etre of the fatbike frame) are largely taking a pass, I think maybe it really is dead.
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Good night...and good luck