I've been in the "action cam" and drone stuff for 15 years. GoPro had a chance to partner... ok, well cooperate with DJI when DJI's drone market started taking off (so to speak!). I knew something was amiss when GoPro purposelessly changed the rear port of their cameras to not accept data transmission to the then Phantom 2 series Zenmuse gimbals. You then instead had to use a cheesy ribbon cable to go into the side port of the GoPro camera. This was extremely frustrating to anyone who had an older Phantom and bought a newer GoPro.
Instead of embracing DJI's innovations and cooperating by potentially supplying cameras or parts, GoPro decided they wanted a slice of the Drone industry... without much of a clue about drones.
At the 2016 Interbike show (One of GoPro's largest retailer appearances) when they first announced the Karma, everyone was in awe of this new machine. I myself was interested and personally could see a need for a drone+action cam that could separate as two different tools, but I could also see many lacking features the DJI Phantom line already had. The folding drone concept was already a hot item the prior year at CES. Little did GoPro know DJI was waiting to pounce.
10 or so days after Interbike DJI released the Mavic Pro and completely crushed GoPro's entry into the consumer drone market.
To top that, the battery connections on the first run of Karmas that cause mid-flight falling bricks pretty much finished off this bird. The publicly announced in Jan 2018 they would exit the drone market, there will be no Karma 2.
Stock prices for GoPro were already in trouble, A high of $69 in 2015, down to $12 by Sep 2016, bumped up a bit as they released their last hope, the Karma, all to have it come literally crashing down. The stock today I see is only $4.40. Sad...
I thing GoPro's ego was too much and now they are struggling to stay alive. I hope the best for them, but they need to listen to the consumer's needs a lot more.
This is not a rant, just my observations over the last several years.