so I'm relatively anti-phone and have been for a while. There was a period of time where I didn't have a smartphone for a few years. When I started using an iPhone again, I realized I couldn't figure out how the heck to delete apps. It was kind of infuriating. I eventually had to look it up online, but the answer wasn't the top one. After reading enough answers I realized the 3d touch was the reason, and that I was touching too lightly or too hard or whatever.
I was so out of the loop that I had no idea the feature existed. When I eventually looked it up, all I could think was "how the hell was I supposed to figure that out?".... maybe they explained it during one of those apple conferences everyone watches?