Have you had any motor or transmission issues with the ecoboost, tow much with it? I have a 100k powertrain warranty on mine and plan on keeping it till that warranty is up (67k more miles to go)...
I have towed many times in the 2500 range and 4 times over 6K. Factoring in it is rated over 9K, I didn’t expect any issues and didn’t have any. VA has small mountains, but one of the 6K trips was over several mountain passes with no issues whatsoever. Put in in Tow/Haul and just went.
We had a 15 that was totaled, put about 30K on it, and now have the 17, with almost 20K, no issues with either.