I'm battling this very problem. Audible books vibrate the hell out of the soundbar. I've been applying foam to quite a few locations with minimal success so far.
I definitely do. It hits the sweet spot on my lower back and relaxes the muscles a bit. Fortunately, we have a solid AC to compensate in the warmer months.
Just picked up my pretty new gladiator last week (21) and am unhappy to report that my carplay in my center console drops constantly. Pretty disappointing coming from a 50k plus vehicle.