I have a Twitter account which is mixture of chatter with friends and colleagues, some computing science things, and a dash of left politics.
Following the example of Jonthan Dowland my Twitter feed has a sliding window of 90 days worth of tweets. I like Twitter (somewhat) for conversations, but as a system of record much less so.
Facebook, Instagram, Snapchat etc.
I’m not on any other social media sites. I prefer email to Facebook and have a face for radio rather than Instagram. If you meet a Jim Webber on these platforms, it’s not me.