Scott Alexander. He used to post on slatestarcodex.com, but has since moved to astralcodexten.substack.com .

I doubt this is right. Scott doesn't do stuff like podcasts or panels generally. He likes to write, and avoids real time stuff. Can you provide a link or something?

That's the author of the article in this thread. Are you mixing things up or are both of these things separately about him?

You do realize that Scott Alexander slatestarcodex astralcodexten

are all acronyms, right?

Probably, but Scott Alexander writes on the latter two things so realizing this is nothing but a curiosity. Dearest Claxton is also an anagram and as it so happens dearestclaxton.substack.com is not written by Scott Alexander. Or anyone really.