The standard wheelbase truck is reported to be 6.8" longer. While that is quite a jump, it's a game changer for cargo space when using the 3rd row. Currently in the 2015-2020 trucks, the space behind the 3rd row is downright dismal!!!! My neighbor has an Acadia (previous generation) and it's got more room behind the 3rd row...... my MIL's Explorer Sport has more room behind the 3rd row. Luckily I don't use the 3rd row much and I also have a Thule roof box but if I had to routinely utilize the 3rd row, I'd need to be driving the Denali XL. I'll be in the market to replace my current 2015 Yukon Denali in about 2 years (it was 4 years old on October 1st). By then they should have any new design bugs worked out.