My post below has absolutely nothing to do with towing with a Model X...
I didn't make it all the way through the video. I know there are those who have "hacked" into the systems that operate the car and made modifications who have subsequently run in to issues with Tesla either disabling what they added and/or voiding warranty on associated systems. I guess that isn't all that different than having your warranty voided if you modify the ecu in most any other car. I dunno. I do know that Tesla is the only vehicle brand on the market (to my knowledge) that actually upgrades the car for your for free from time to time via OTA updates. You can disable the vehicle from receiving such updates if you want, but that may ultimately also result in warranty coverage issues. We've only had our Model S for a few weeks now, but it already received an update that improved the voice recognition, navigation, the rain sensing wipers, and a few other things. Several months back, they pushed out an upgrade that increased the power of the cars. That's pretty freaking cool, in my opinion. In the 2015 Toyota Land Cruiser we just sold (also a truly fantastic vehicle in its own right), the nav system got more and more out of date over time and could only be updated by paying a bunch of money to a dealer. Only time will tell what our overall ownership experience will be like, but at this early stage I can tell you that I am completely impressed with this vehicle - comfortable, quiet, solid, extremely quick....and has a full "tank" every morning. Apples to orange, I know, but in the short time we've had the Tesla, we've also had a net "fuel" savings of over $500 as compared to our Land Cruiser.