Quote Originally Posted by The Big Dice View Post
Bear in mind that RTD was actually establishing Who as a new show that nobody had ever seen before. Even though it happened to come with a 27 year legacy. It wasn't actually until season 2, with School Reunion, that we had hard evidence that the show wasn't a reboot and was actually a continuation.

With that in mind, it sort of makes sense to play it safe. Though I have to say that the thing last season of the TARDIS exploding and wiping out all of time and space seemed a little bit too much. Especially with the (what I felt to be) rather clumsy handling of the cracks in time. Those things that just happened to be everywhere the TARDIS went, but mostly only seen in the final shot of the episode.
See, I got the impression that the Tardis exploded out to where it had been, and that's why the cracks were everywhere they went.