We have officially arrived in late-stage social media. The services and platforms that delighted us and reshaped our lives when they began appearing a few decades ago have now reached total saturation and maturation. Call it malaise. Call it Stockholm syndrome. Call it whatever. But each time a new platform debuts, promising something better — to help us connect better, share photos better, manage our lives better — many of us enthusiastically trek on over, only to be disappointed in the end.