Instagram seems like it would be the most resilient. It's so low level, with few gimmicks, you just share a piece of media. Humans will want to share with each other until the end of time. Snap and fb have interesting features but it's less clear whether they will always remain popular.

What are some shifts that can take Instagram down? The main one I can think of is decentralizion and owning/controlling your own data, but that would hit almost everything.

Do you think the shift away from these sites will be structural/technological (again, like if the world generally moves towards a different business model than data collection), or do you think these sites will be hit for specific reasons?