As these cars age we are seeing their air suspensions fail in a predictable pattern. First one airbag or line develops a small leak. This causes the car to change height slowly whenever it is parked. This movement accelerates sensor wear, but more significantly it strains the compressor which soon wears out and sets "slow to pump up" faults. People think the compressor is the only problem but they are not fixing the underlying issue till they fix the leaks. When they change a strut that shows them how worn the other struts are by that time (as evidenced by ride) and the cure ends up being a compressor, o rings, new struts and maybe some other parts. The bill: Well over $10k.
When people complain about that I point them to the same costs on an S-Class Mercedes, or the even higher costs to do struts and springs on the previous generation of Bentley Continental. The same can be said for control arms, ball joints, and other front end components that wear out a lot quicker than many owners would like. Seldom will a front end in one of these cars have the durability of a Chevy pickup, despite their vastly greater cost. All I can say by way of explanation is that performance and exclusivity have their price, and Bentley suspension work pales next to comparable work on most Ferrari or Lamborghini.
Updates and module replacements add cost when compared to older cars, but when compared to costs for similar high-tech vehicles there is nothing on these cars that stands out. The technology in Bentley is shared to a significant degree with high end offerings from VW/Audi so the updates mostly follow patterns set in those higher volume car lines.
John Elder Robison