Where I live, the cart work is very much alive. The local congregation has a schedule posted on the "information board" that shows the times and individuals assigned. One is set up near the courthouse where there is some foot traffic and the other is set up at the local train station. They also participate in a metro plan where they set the cart up in populated areas.
Most JWs I know love the carts. It's super easy time. You stand or sit around, drink coffee and occasionally talk to people. If I were still going in FS, I'd be spending the bulk of my hours doing that instead of knocking on doors.