Because it is increasingly difficult to attract new customers and keep them interested. More and more designers and customers rely on both the website flash templates to try to deal with the invasion of short attention span generation. With a bandwidth no longer an issue, and armed with a powerful arsenal of rich media Flash many say is already high and ready for the weapon of choice for the industry to be. Yet those of us closer to finding our inner geek, will be more familiar with the technical issues surrounding Flash can, it seems a bit less (pardon the pun) inspired by al those fancy schmancy.
Admittedly, for every obstacle and every flash hole may have been, always, which is the case, they also still Flash and promises to continue with some really great virtues of the table. But there is good reason that dazzling special effects, the place of the long flat HTML content to a website. Good animated flash gives a clean idea about your target to your visitor at a glance. No need to see the details of your content read.