He was the only one still involved since Casey Kasem left. North wasn't actually the original voice of Daphne, either. It was Stefanianna Christopherson, who left after the first season of the original series.
20 years ago, we lost Don Messick.
3 years ago, we lost Casey Kasem.
A few days ago, we lost Heather North, the 2nd Daphne. (Let's not forget that Mary Kay Bergman, one of Heather's successors, passed away a few years ago, too.)
Let's see if CN/Boomerang does a marathon in memory of Heather.
FWiW, let's also consider her face acting resume (i.e. Days of Our Lives). I wonder if they'll mention anything on Days.....