Gary once said "People hear with their eyes", and this seems like a good observation to me. In my own experience, "non-jazzers" don't like bebop or dance to it, but they seem to really enjoy it live, such as if they come with me to hear my friends playing on father's day or my birthday. Live jazz is a very different experience, and I am not surprised to hear the reports of people dancing at concerts. But in my house or on the radio, the same people have limited tolerance. So I think that a lot of jazz is not danceable to nearly the degree as familiar music.
I did not go back and reread the thread, but I do not read Grumps' remarks above as saying that jazz is dead or that there is anything wrong with it. It's not popular and it is the music of a relatively few people. Those are facts. Beethoven's music and Gregorian chant are also the music of a relatively few people. No one dances to them so far as I know and there is not a top 40 for them. But nothing is wrong with them and they are not dead.
Personally, after taking a few college courses, I think I do understand a good deal of post swing jazz. No one hears and can understand everything of course, and I don't mean to demean the talents and work of our fellow members. But with occasional exceptions, the stuff I do hear and do understand is stuff I don't particularly want to hear or understand more of. God bless you if you do, but I just don't like it. Get it? That does not make me ignorant or a snob.
I don't see anything helpful in saying that people who dig free jazz, bebop, fusion, etc. are snobs (even if some of them are). By the same token, I think it's at best useless to say that people who are not on the bebop train are ignorant or snobs.