I tend to baby a new truck for the first year or so, but after that, it's full speed ahead, damn the torpedoes and go where you need to go. I have replaced two skid plates on my 2012 Tundra and need to replace the current one, now.
One guy with whom I hunt quail lives over around Tucson. He takes his new trucks out into the desert within the first week or two. He drives them through the mesquite and catclaw for an hour or so to knock the new off and then doesn't worry about it anymore.
