Living in the North we don't have salt water issues but do have road salt issues. I lost my last "little" SUV to rust (frame rusted through and too expensive to repair). Since I'll be buying the Bronco brand new i do plan on undercoating. I have seen trucks with a coating of rubberized material almost like a bedliner on rocker panels and fenders to protect against rust. Don't know how well it works. I know some guys replace their brake line with another material that doesn't rust like steel. Washing the salt off as soon as possible is another idea. I guess it all comes down to how you choose to handle it. It's not just one brand's issue. I've owned several Ford trucks over the years and actually had more mechanical issues with another brand than i ever had with Ford.
Replacing your brake lines with stainless helps. I worked years ago (40+) at a Buick dealership for two years. They were a generational Family owned business which really cared about their customers. Giving them rides to work, or back home. Then pick them up at said location when their their vehicle was done. If it wasn't they would produce a vehicle for them to drive until their vehicle was completed. Many single women bought Buick Regals from this Dealership because of their reputation, and how they understood, PEOPLE rely on their cars. Sorry for the rant. A couple times a year this said dealership would give away "undercoating" with every Buick sold. They would sell so many cars, it wasn't funny. The service building was awash with new deliveries waiting to be completed. So, if you get your vehicle undercoated>>>>>before any water hits the belly, you can stave-off the rust and corrosion a bit. The manufacturers are much better about rust now. But it still happens because of chipping from rocks, and scrapping from anything. If you use your vehicle for towing a boat to a salt water boat ramp..... there isn't anything that can help but watering your vehicle immediately. The "undercoating" resembled coal tar, but I'm not for sure what the dealership used. They undercoated my new 1978 Chevy Van for free, because I worked there. It also made that Van quieter! Baja On!
Baja on! As Ford Spanked the competition in 1969, in the Baja 1000, NO OTHER AUTOMAKER HAS, replicated in 50 plus years