Just read the change log:
Fixed wing mode, added gimbal control in fixed wing, improved hovering and RTH performance, better gimbal calibration, double remote control, etc.
I know that some will say they don't need anything of this. Fine.
Those above (and more in the change logs) are just the bare facts. Everyone can make his own decision.
Thank you
Fixed wing mode is a novelty item and not used by most people.
Improved hovering and RTH are a joke! My mavic can land within 2" of take off point from a 3000ft RTH.
Hovering has always been rock solid on 400. In later versions I notice a lot of altitude deviation.
Which brings us to the meat of the problem.
Almost every firmware since they went past 400 has been a fix for the bugs introduced In the previous version. 500 was bad 550 was worst. 600 attempted to fix bugs in the 500 series and ended up needing 700 to finally get things back on track. Now 800 comes out and we read posts full of problems again. All of this happens while security tightens and DJI gains more control.
Rob