I think the difference is asking what happens if all contexts collapse. In the 2000s or 1960s context collapse was something that would happen occasionally when opted into. These days everybody is hyper connected and living in a collapsed context every day. That's the uni-context and the implications of it feel very different than that of a wedding or old-school forum. A wedding wouldn't push people to permanently change who they are or how they perceive themselves for more favor in the collapsed context. They would only do it momentarily.

Also, the wedding or forum had very limited scope. As mentioned in the interview, the uni-context is about context collapse on a global scale.