I say until I die.
As for not watching Cartoon because they are no longer animated in America... C'mon America isn't the only country that produces cartoons, I like practically all forms of animation from any country, Japan, Canada, France, Russia, Germany, etc. They're all good from what I saw in my "History of Animation" Class I took last semester.
Like other said, South Korean studio just do the tweening, color, and other stuff. The Avatar guys said in an interview here that they mostly animate the main frames, and send it to be tweened in Korean studio. If Voice acting was done somewhere else that wasn't by Americans, Canadians, and other primary English Speaking country, I think I would notice a VA sounding somewhat like my tech support guy that isn't an over exaggerated accent.