Kinda like fat bikes to me, really fun to have if you have places that are just meant for that kind of bike. My gravel bike is really set up as a bikepacking bike and much of what I've toured with it has been rail trail that isn't always paved so perfect use.
Though just today my wife discovered that there's cheap fat tire bikes that she'd like to get so we can go ride the beaches in the off season around here without worrying about the sand ruining quality parts. Hard to argue with her on it.