Anecdotally, I know a couple people who buy a GoPro for a specific adventure. They use it, it's cool, but then it gathers dust for months afterwards. It's not hard to find used ones locally. Or to have a friend who you can borrow from if you know you aren't going to use beyond your own single adventure of the year.

In terms of daily videos, the mobile phone is good enough for most people who want to capture moments.

My comment isn't meant to poo-poo the GoPro because the product definitely fits a niche, rather to say that it wouldn't surprise me to see GoPro hit a certain ceiling with just focusing on portable camcorders.