I am looking forward to posts about air compressor wear.
IMO, the off road modes are just computer actuations. Not using them should make no difference.
As far as the air issues go - IMO the vehicle uses the air all the time anyway. So, IMO the pump is always "active". When you get into it, there's a change. Park somewhere, and there's a change. Put something in the back, and there's a change.
So ... I use my air all the time. I let down the vehicle for people to get in and out of the vehicle. I adjust the air when I connect a trailer. I raise it for speed bumps. Also, people have had compressor failures, who have proclaimed they never used the air adjustment.
For off road though - I think guard for it is necessary, to protect the compressor, as the shielding is not good for that part of the car. I need to get mine done actually ...

