Glad I ended up with Moderna. About a day or two after my wife found me the appointment for the Moderna, she learned that she'd be able to get me J&J if I wanted it instead. I preferred Pfizer or Moderna, so because I already had an appt, I didn't want to do J&J. But if I was still in purgatory wondering when I'd be able to get the others, I would have done J&J in a heartbeat.
So it all worked out.