I think it's noteworthy because he was somewhat prolific in leftists circles.

https://truthout.org/articles/william-rivers-pitt-dared-to-hope-for-our-future-lets-do-right-by-his-memory/

He claimed to be fully vaxxed so likely would have been lining up for the bivalent booster sometime in the last week or two, but I haven't been able to confirm he actually took it or any vaccine proximity to his death:

https://truthout.org/articles/covid-isnt-over-the-us-must-do-more-to-combat-it-worldwide/

https://nitter.net/WRPitt/search?f=tweets&q=vaccine&since=&until=&near=

Reminds me of someone in the Berenson or Taibbi mold in that their brain is very active and generally well-tuned but with golf ball-sized spots of inactivity in a few places. Too arrogant to question their assumptions, but knowledgeable on some topics and capable of recognizing some corruption in their party.

https://www.democraticunderground.com/?com=view_post&forum=1002&pid=17197580

I've been watching the most ardent vaxx-worshipping sites very closely because I figured they'd be the canary in the coal mine as far as side effects go. While they're very sick (they get COVID & "Long COVID" frequently and have flu-like reactions to the shots) they haven't been falling off in a way that is obviously vaccine-related.

RIP to this man whose positive energy could have been aimed a little better, and prayers for his family that they'll find peace, prosperity, truth, understanding, and fond memories after his passing.