Having a so-so reputation for performance of the tires, and long delays with delivery has hurt them.
Ad to that recent increase in Stickies: Treps, SXs, etc, plus good reviews from companies with smaller-medium tires (Like Patagonia) at great prices, plus covid and his fate is doomed.
This makes me a bit worried for the future of Krawlers too. I wheel with a pretty kick ass group of 4 wheel steer rigs and just about half have made the switch to MS Patagonia's right now. They are affordable, and they work. Like really work. My favorite tire of all time is the Krawler but I can't do $800 per tire and buy 20's when I can get the Pat's for $400 each and they fit my 17's. I hate to brag on foreign tires over american made but there is no comparison between PB's and Pats size for size. The PBR might have a tougher sidewall but the traction isn't there. And yes I've ran both in the same size before anyone jumps my shit about it.