My 2019, with NO modifications had the passenger side boot go bad at 4500 miles. I took it in for an oil change and Ford noted that it was leaking and ordered the boot. The truck is a mall crawler, so no off road damage.
I brought it home to do my own tire rotation, as I was painting the calipers and wanted to clean the backside of the wheels. When I took off the right front.....it was more than just leaking....it looked like a grease bomb had gone off. It took me over an hour to clean the wheel, frame, brakes and A arm.
With that much grease, I wanted more than just the boot replaced. When I took it back in for the repair, they told me they were replacing the entire joint. I had a feeling this wasn't there first time with a blown boot. I'm a little concerned now about the integrity of the boots.