As an autistic who has been online since the early 90s, this article didn't speak to me at all. My autistic internet comprised IRC and USENET, and it died when LiveJournal died. I still have close friends from those days, when I have no close friends "IRL"- I can't say that for anyone I met on Twitter or Facebook, in fact I found both of those platforms to begin enshittifying looong before any of the NTs began to notice it.
I don't think it's just because I'm an older AuDHD woman, I think the existence of Facebook and Twitter from the mid to late 00s killed the autistic internet.