Please don't take my post as being the drone police , lol . I was just stating that you could set a warning and limit for altitude since you said you hadn't noticed that you were that high . Also that wind conditions can be drastically different at higher altitudes than at ground level and the Mavic can get in trouble quick if you're not paying close attention to what it is doing up there . Lots of people get at high altitude and don't look at the distance display to realize it is getting away faster than it could ever make it back . You are right though that flying over 500' I'd say , doesn't really get you much more payback for the risk .
On a side note , I have about 8 acres outside of town that I have been clearing of trees and building a pond over the last two years in prep to build a new house soon . Directly overhead I see commercial airliners at 15-30,000' everyday , a private plane every now and then at 3-5000' and there is a Air ambulance heli that skirts the property pretty regular at about 1500' . The heli pad and local small airport is 4.8 miles away by air and I am parallel to the runway behind the tallest mountain in our area . I feel confident that any full size aircraft on my side of the mountain would be well above what I fly at or be in serious trouble anyway . With that being said , this past summer I was on the tractor using the back hoe when something sounded like a train not far off so I stood up in the seat to see what the heck was making that noise when a Military Osprey flew directly over the tractor at what I'd guess was 500' ! I could see the writing on the fuselage as he was in transition from forward flight to hover mode . The props stirred up dust around my tractor . I actually wished I had been flying my Yuneec 500 at that time as it would have been cool as **** . You never know what is going to happen