I can't talk about the evolution of the community, because I only started looking at this board around the time of NMV, and I think Yuma had "outed" before then. So I can very well be talking nonsense on the subject, and if so, I apologize.
However, I don't think there's so many people involved in this board that the definitive departure of one of its oldest members can be swept under the carpet. In particular, pretending that Yuma deleted his account because of that single fight in the Dune Mafia thread is disingenous, especially when other people have expressed similar concerns (I am thinking about Twistedarcher, but he may not be the only one). That is not to say that it was anyone's fault, nor, as Yuma said, that the community has become toxic, but I think we owe him to at least understand what it was that led him to be so disenchanted with it that he deleted his account.