Originally Posted by HarryT
But bear in mind what PDFs were designed for in the first place: to be a digital representation of a printed page. The problem is not with PDFs - they do their job excellently. The problem is that people are attempting to use PDFs for a purpose that they were never intended for.
Yep, they are a product of their time. Technology has moved on though, hence the need for something more flexible.
There's been a similar shift in web design. Back in the late 90's there was an obsession with making a site look the same everywhere. Remember the "best viewed in" banners? Modern sites now accommodate a variety of devices and screen sizes (or readers for the visually impaired). PDF is still stuck in the "best viewed" era. ePub is close in that it reflows, but it's not quite there as a replacement.