Interesting hypothetical topic to consider (in terms of funeral services I mean- not in the sense that death is a hypothetical). Anyway, I think I would probably attend my T's funeral. It would be very easy to fade into the background as he is also a tenured professor at a large university. Therefore, I imagine there would be a large number of non-family attendees. On the other hand, I probably wouldn't attend if I expected it to be a smaller ceremony with mostly family and close friends. That would feel intrusive on my part.

As far as my own funeral goes....don't really care who does or doesn't attend. I'll be dead so it won't impact me at all.