In your opinion, what took WWE so long to realize The Undertaker has an undefeated streak at Wrestlemania?

Most likely took them ages to realise things, often does. I remember in 2001 with him they kept on about how he'd been there for over 10 years and they needed to beat that streak or something then, might've been going on about WM then, god knows. I remember people like Stephanie saying all of that when her and Shane were trying to take beat out WWF with their invasion. I found that a bit funny because there was loads of others that had been in it for 10 years or more before him.