We have had two so called major problems, 1st was the electric side of the HW heater failed, 1400 miles from home, 1600 from dealer. The second was the kitchen slide wouldn't go out, thankfully the problem wasn't "Wouldn't go In". Happened 10 hours from home, I fixed that myself, a nut that held the hydraulic piston on fell off.
My point is it seems your never near home or your dealership when problems occur.
The second issue is not all dealership will deal with you professionally and not all service departments are the same. With the hot water heater I had a bad experience with Camping World in Seffner, Fl. I will never go back or recommend them. I have heard good things about Kissimmee, Fl.
Enjoy your new FW and only worry about things when they happen!