they did that till the very end. they just realized it was the ultimate killer feature so it was cleverly removed from the lower end models. the high end ones

they did that till the very end. they just realized it was the ultimate killer feature so it was cleverly removed from the lower end models. the high end ones could always be turned region free. in the very end the ones with multidisk and what not could be factory reset to clear the 3 region change restriction.