Long stretches of washboard are my main "obstacle", and big tires aired down seem to be best solution for that.
So far I haven't seen anything on the new model that would make me want to buy one. Yes, a lot of things have changed because upgrading to current tech/standards was necessary... at least every 15 years.
I don't know where you are finding the "fanboys" but on Tundra forums the shortcomings are well known and discussed. So is the fact that you can sell your used one with 150k miles for a relatively ridiculous amount of money if it's been well maintained. That and the lower hassle and cost to repair is the main reason to own one.