Flash is no longer necessary, has said Steve Jobs in a long letter on Flash.
In short, Steve Jobs claims Flash drains the battery of mobile devices; it’s not very good for multi-touch operation; and its performance, reliability and security are all shoddy.
The CEO of Apple concludes that Flash is a relic: “Flash was created during the PC era –- for PCs and mice,” he says, “but the mobile era is about low power devices, touch interfaces and open web standards –- all areas where Flash falls short.”
But the main reason why Apple doesn't allow Flash on iPhones, iPods and iPads is that Jobs doesn't want a competitor.
Adobe has declined to comment.