"Since the only reason for the death of Commodore and Atari was themselves."
That has pretty much been the history of computers for everyone. MS isn't dominant because they did everything right. The are dominant because they shot themselves in the foot fewer times than everyone else.
The only reason that Mac is still out there as a far second run competitor is because MS bailed them out so that they could claim competition.
It will be interesting to see what the long term holds for Linux. Is giving everybody pellet guns safer for you foot than having your CEO swinging a shotgun around or does it just mean that you die the death of a thousand cuts in a strung out mixed metaphore?