I drove the new 2022 Yukon XL AT4 with magnetic ride and air ride suspension with factory 20” wheels and did not notice that it was much smoother/softer compared to my SLT XL with 22” wheels and NO magnetic ride, and NO air-ride. Normally 20” would ride little softer due to higher profile tires. The AT4 had higher profile tires, magnetic ride and Air-ride suspension, and it was not noticeable better. I did like the option of lowering it and the extra 2 inch higher clearance. As far as I know, there are 4 settings: lowest setting is 2inch lower than my SLT and is used for entry/exit only (can’t drive with it lowered), setting #2 is the normal setting that all Yukons are that are without air ride option. #3 setting is 1 inch higher for increased ground clearance, and can be only driven up to 45-55mph (if I remember correctly), and the 4th setting is maximum ground clearance with 2” higher than normal and can only be driven in 4WD-LOW. Maybe if I would drive it on rough road I would notice that air ride is smoother, but in the city on paved roads I did not notice the ride quality difference. The main benefit is for lower entry and for higher off road ground clearance. I do like the option for it, nice to have it. But then depending on how often it will be used and if it’s worth paying extra for it, also may be more expensive for future maintenance when it is out of the warranty. I would have gotten the AT4 if Diesel engine would be available in it. Rumors say that 2024 may have diesel AT4.