Well Toshiba was an inch from bankruptcy and Sharp was sold to Foxconn to stave off its own impending dismemberment so now I really don't understand this definition of success.
And Microsoft is not alone, Google essentially became MS 2.0 when they launched Android. Following MS footsteps to become successful. Which just further proves Microsoft's model.
Even though that's also approximately as long as Apple has been on its current success cycle anyways? If Apple had been "born" in 1998 would it be a "success" now like Google because the mac era never happened but things took off with the iMac and then the iPod?
This kinda feels like you decided on a conclusion and are now trying to backfill an explanation into it. :P
In fact the Macintosh lineup profits are likely more than the rest of the pc makers combined.