All I can say is it's not a real time system but yeah, I think you're caught up too much in "the accessory kit" thing. Anyway, too much to go into ATM so I'll leave this with you.....
Let's not forget the "hunters" who slaughter wild pigs and prairie dogs by the hundreds because they are pests and they destroy *everything*
I give them a pass whether they are using machine-guns, riding in helicopters, or even using...
There are many Hunters in the World Those that Do it to feed there Families, Those that Do it occasionally and eat what they get, or go on the occasional Hunting meet where game is taken and given to needy charities. Then there are some that...
For anyone who hasn't been inside a typical Chinese factory or realize even the most obscure of electronics is still "electronics" that cannot be reasonable done in America, check out this video (there are many on YT) if you want to get an idea...
There is no DJI website that tells you if you buy the drone whether they also have the accessories in stock to ship you. It's not a mom/pop operation where someone can go in the back and grab the boxes. We don't know the DJI process of how/when...