Why Heather Langenkamp will not watch the 2010 NIGHTMARE reboot

Her words reported by MoviePilot:

“I can’t let go of my own vision of Nightmare on Elm Street. I just don’t want to. I don’t want to see another person play Freddy Krueger. I don’t want to see scenes that we worked really hard on be reimagined. I respect their reason for doing it but I don’t want to have it in my imagination or my mind. Those memories are so precious to me. I was a teenager when I made that movie so it’s so formative. My friendship with Robert Englund is so important to me that I don’t need it.”

I agree.
Most fans do as well.