I don't know of any other suspension system that independently can vary ride height, spring rate, and damping rates. Airbags are the reverse of ideal - at low height they're soft and at high height they're firmer springs and they also have pretty extreme progressive spring rates. I used them on my 4Runner in a custom setup using GX460 parts. But never really liked the ride quality. The issue is matching damping to match the highly progressive spring rate. Not a good match with progressive shock valving. AHC is pretty remarkable in how it can add or remove chambers to adjust spring rates along with height and damping. It's super complicated though. The only other way I know of to do something similar is by adding a negative air chamber to an air shock like the ORI struts, but the aren't adjustable on the fly.I LOVE AHC.
I had very little knowledge about it prior to owning the LX 570
All I remember is it being a hated option ( from my days reading the 100 section ).
Honestly love it, let's say it does go wrong...when? After 15 years +? I will take my chances honestly. Love the way it levels out when fully packed and how it so active. I never realized how active the active part is until I see it adjusting itself with load; etc. Still cool now, imagine back in 1998?
Ride could be better in certain modes - I find firm too firm and soft too soft and normal meh but other than that honestly I prefer it over nothing ( if I were to keep it stock )
I'd love to see that system expanded to more models although it appears to be trending the other way.