Boot up times are the reason I switched to a laptop for my in truck computer. I take the laptop with me when i leave the house, have it already on when i get into the truck, click it into the docking station and start my truck and it's ready to go.
No waiting for it to boot or anything. I have another docking station in my house so I just take the laptop with me when I leave the truck. Works pretty slick. Maybe that will help someone for an idea that is worried about boot times.