Definitely a market correction for fat and 27.5+. Fat market became saturated and the number of people left to buy one has diminished because a bunch of us have fatties now. I've reserved my fat bike for winter use only these days. Tried riding it for a full summer and it just wasn't fun with no suspension.
I like 27.5+ tire size. Had a full suspension 27.5+ bike and loved the traction and how much easier it was going thru rock gardens. I sold it a few months ago and am saving up for a new 29er with 27.5+ option where I can just swap wheels. In the meantime been riding my 29er hardtail which has noticeably less traction.