I shouldn't jinx it by speaking, but I've played the 2000 since October 2001, and well over 500 jobs I'm sure. So far I haven't had any indication of anything breaking down.
As DonnyNJ says, I'm not a banger, but neither have I consciously babied it.
I wouldn't recommend it to a piano player. I'm certain it wouldn't stand up to really hard playing, but then most of the keyboards won't either. Touch sensitive means "touch", not hit.
DonM