A lot of his ideas remind me of the BeReal app, it limits posts per day and is geared toward 'friends in real life' and with just a few friends on it I've stayed engaged. But it's sparse for me and can be a ghost town much of the time, but that may be just because my friend group isn't using it much. There needs to be sufficient network effect to maintain and grow it's reach as a network, which may be antithetical to its founding principles.