The Smart Controller and the "standard" controller that comes with the Air 2S are both Occusync 2. So, that's why there is no disclaimer for the Smart Controller. In theory the range and communications between drone and controller is the same no matter the controller. That said, there are a number of reports that say the Smart Controller gets less range across the board (not just on the Air 2S). And others claim it is similar to a standard controller. IF there is an issue, this is not an O3 issue, but a Smart Controller range issue with 2 or 3.
That's interesting. So it's the drone side that matters, not the controller. I have heard about SC range issues. I don't have a standard controller to compare, but I've had mine out 13,500 feet with varied landscape elevation and a rural/suburban area.