"In 1995 Microsoft had a HUGE marketshare lead with DOS. That meant it had a huge army of developers who didn't want to switch over to Apple's system, which they saw as very closed and inflexible. I remember developers coming into the consumer electronics store I helped run in the 1980s and they'd complain bitterly about Apple's policies (Apple was far less flexible back then than it is today and forced developers to fit into a "look and feel" set of guidelines).
But I look at who is making money. Back in 1995 developers were mostly making money from DOS. Remember, this caused WordPerfect and Borland to make bad bets. They bet on DOS for too long, while Bill Gates went and built some of the first and best Macintosh apps. The lesson, though, doesn't pass from 1995 to 2011. Today where are most of the developers making their money? iOS (according to Sephora, Starbucks, OpenTable, eBay, and many other developers). So, Android has to convince developers to switch, or do both platforms at same time. That's quite different."