Anyone with a moderately sized music collection depended entirely on iTunes to manage their library, and were hence locked in to the iPod/iTunes eco-system. There was no reasonable alternative.
Manually copying mp3 files to a Nokia or Blackberry just didn't come close to cutting it, and any attempts by those companies to compete with iTunes on the desktop ended in miserable failure due to piss-poor software quality.
Manually copying mp3 files to a Nokia or Blackberry just didn't come close to cutting it, and any attempts by those companies to compete with iTunes on the desktop ended in miserable failure due to piss-poor software quality.