But with iTunes, Jobs moved quickly to make iTunes Plus a possibility. And it's got more DRM-free music than its next-largest competitor, Amazon, does.
Without the DRM, we'd see a much more fragmented player market. iPods might still be the leaders, but they'd almost certainly have a lower market share.
People think iPod sounds reliable, and MP3 player sounds unstable. They go for the iPod because they think it's the only one there is.