hell no it isnt. so Limp Bizkit and Papa Roach are fading away, hell thats a good thing, they sucked. along with Linkin Park, they were the shitty commercial nu metal acts that were giving the genre a bad name. there are tons of great nu metal bands out there.
for example:
Sevendust
American Head Charge
Mudvayne
Korn
Drowning Pool
Mushroomhead
Deftones
SOAD
to name but a few.
i personally dont like nu-metal , but there's a couple of bands that really go my attention. well... the same thing almost happened to heavy metal in the early and late 70's, so my advice is to continue to support your favorite bands, because if they made it through this decade, they will pass the test of time and they'll be stable