I've also started shooting my skydiving videos with a 4K GoPro, and even when viewing the videos at 1080, the difference is pretty amazing. You can actually see air traffic (Canopies, wingsuit guys, nearby planes, etc) that would not have been visible with the old GoPro. There have been several cases in the past where I'd be flying my wingsuit and spotted planes or tracking groups below me that didn't show up on the video with the old GoPro, and you can actually see the things that I saw on the jump with the new one.
Source: Room mate had an oil leak and never checked her oil level.
What is worth doing is worth the trouble of asking somebody to do.