I had a 27.5+ bike from 2016 to 2020. It came with 27.5 x 2.8 tires. Sold it and went back to 29er for the trail bike. Running 29 x 2.4 in back and 29 x 2.6 in front. Wouldn't want any larger. My XC bike will only fit 29 x 2.4 max.

I guess my point being that those tire sizes ended up being a passes fad. I feel the same will happen with the 32" if it actually takes off and becomes mainstream. All we have now is a few boutique builders and a handful of component suppliers.