I have a bad habit of just dropping out of online conversations at random. Be it due to lack of interest, depression, just not having anything to talk about. I have a similar habit IRL where I will just forget people exist and kinda do my own thing. I guess that applies online as well, I just do my own thing, do what makes me happy/content.
I had a good online friend named Sara who up and disappeared one day back when I was a teenager. Deleted all her social media, Skype, and everything. No idea what ever happened to her. On the flip side this one guy I used to play BF3 with on PS3 back in like 2012 is still active on PSN. Don’t talk to him anymore but it’s kinda endearing to see him still online after well over a decade.