I had friends who exclusively bought Snap-On, Mac, etc. If a wrench showed signs of being beaten by a hammer (to free up a nut or bolt) then warranty was denied. Never such a problem with Craftsman's UNCONDITIONAL warranty (at the time, anyway).
From Snap-on's website: "In addition to any limitations outlined in warranty statements provided with the Product, Snap-on does NOT provide any warranty for (1) products labeled other than Snap-on or Blue-Point or (2) products subjected to "abnormal use". Products that are not labeled Snap-on or Blue-Point are subject to the warranty provided by the manufacturers of those products and Snap-on will pass along any such warranties.
"Abnormal use" includes misuse, accident, modification, unreasonable use, abuse, neglect, lack of maintenance, use in product-related service, or use after the product is significantly worn. Abnormal use of tool storage units also includes, without limitation, situations when a unit is pulled using a mechanical vehicle, rolled over large drops, used in a highly corrosive environment, used as a step stool, modified with non-Snap-on parts, overloaded or modified in any way. "
From Craftsman:
https://www.craftsman.com/customer-care/warranty-information
Of course, my tools were purchased during the Reagan administration. I have replaced 1 screwdriver I used as a chisel. No questions asked. I replaced many tools because I worked in a lot of acid (cupric, nitric, etc.) with no questions asked. My friends using Mac and Snap-on were denied warranty because those companies determined the tools were abused in such an environment. The only other alternative would have been titanium tools, but nobody was going to spend on those. I stuck to Craftsman.
Anyway, the point is that a 1DX carries no more warranty than the Rebels. 1 year. So paying extra doesn't guarantee anything. It doesn't make it more professional, although we would all agree it is a much tougher camera. It will take more abuse. But people saying they abuse their equipment because it can be abused more are just silly. If I had a 1DX... I would baby it.