When ~10% of the people who buy an iPhone are willing to go to extreme lengths, following complex instructions from sketchy people (like me) on the Internet, voiding their warranty in the process, to get it open, you simply must assume that the real number of people who want to do it (even if they cannot verbalize that, as they are currently stuck on other scary steps that they feel are intrinsic to the experience) would in a world where it was even slightly more supported and not actively trodden on.
How many of them want to do it for the freedom of installing apps that aren't available in the App Store, versus how many want to just install App Store apps without paying for them?
Of all the people I know who've jailbroken their iPhones, I know exactly one who wanted to extend the system capabilities of his iPhone (he has some cool mods that let him make wifi and bluetooth adjustments from the home screen).
The rest of them just wanted to get software without paying the developers for a license.
The problem with anecdotes is that other people can use them too: I only have ever met a single person who "just wanted to get software without paying the developers for a license". Most of the people I've met are addicted to the ability to change the icons and sounds with custom themes.
