I deleted all my other social media without any interest in preserving it. Maybe it's because I'm old and have seen multiple social media sites that I've used disapear, but to me social media is more like a mandala than an oil painting or a piece of literature. It's ephemeral.
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The only stuff I view as "permanent-ish" are websites I personally run, because I know I will continue to.
So, dig out a lil hole somewhere, and use social media as tentacals.