Market share should be a consequence of your goal. That can't be the goal. The goal is to build great products. I have an infinite respect for Steve Jobs because whatever else you say about him, his passion is to build a great product. Good things come from that.
Bad things come from a focus on market share.
So the Linux community should have as its goal to build the greatest operating system. Because that's a market-share goal. That's a very, very destructive, counterproductive goal. Make it the best product it can be. Linux to me is like amateur radio was to radio.