Convenience products age horribly when the culture grows past them. When I was a kid, Jell-O had STATUS. Not luxury status. Futuristic status, man. At family gatherings, someone would inevitably arrive carrying a wobbling molded tower with fruit pieces trapped inside like prehistoric insects in amber. That thing would shimmer under the dining room lights while adults discussed it like an artistic creation. You can almost hear the old commercials in your head. This week Kraft Heinz announced...