> In my opinion, author is just trying to justify Apple's lack of > business acumen, and the lost opportunity
Gruber's article does a good job of dissecting Apple's fateful
decision... but it remains arguable. Steve Jobs wasn't at the helm when
the decision was taken [infact all of Apple's period of inactivity was
when Steve wasn't there]. Besides, Apple's former evangelist Guy
Kawasaki has admitted that it was a mistake .
But when it comes to Apple's market share, you have to understand the
market they compete in. Apple has never tried to sell their Macs to
corporates, which makes for the bulk of PC sales worldwide. They are
leaders in Education with over 80% market share. They have over 50% of
what they call the "creative-professional" market. And their consumer
market share nearly doubled in the past few years. 
Apple and Dell are the only two companies which are making money in the
PC business. HP/Compaq, Gateway, Sony, IBM, Toshiba are all LOSING
money in the PC business. 
With all this and over $21 billion in market cap, rejecting Apple for
their "lack of business acumen" does sound a little exaggerated.
>What exactly is market share? In most markets Apple competes in, they have
>double-digit market share, in many core markets they simply dominate.