I suspect that there can be dozens of types of community and for each type there can be thousands of communities - each unique with its own flavor.
I suppose this is a bit like
art: there can be dozens of types of
art and for each type there can be thousands of pieces of art.
It is my impression that most people that discuss community insist/demand/require that all community must follow one pattern. Or be structured one way. Or follow one path. It is really difficult to discuss alternatives with these folks.
One type of community is ....
online forums. And this forum is one piece of art. Of the thousands of other forums, this one is different. It appeals to a very few. It is boring to most people and utterly wrong and unacceptable to many people (like the people that have been banned, or have quit because of my "tyranny").
And, of course, there are communities of many people living under one roof, eating at one table. Some of these communities are four or five people. Some are more like 60. Some are managed with consensus. And some are managed with something else.
Some paintings are landscapes. And some paintings are nudes. One painting is the mona lisa. A lot of people like that, but like the last supper better. And some might think the birth of venus is the best.
Some people might stay at one community all of their life. Others might move around a lot - not because things went wonky, but because they seek a life with more diversity.
I felt the need to express my position that I wish for there to be many communities and many types of community. And when somebody says there can be only one, I wish to suggest that there can be at least a thousand more.