I think it's mostly not discussed around here because it is fairly low-level plumbing technology, as is a lot of other network tech. You don't see much discussion about SDN approaches, routing protocols, ... around here either. Most "users" of Open vSwitch probably don't know that it runs in the internals of the virtualization platform they are using, since it is hidden away under other layers.

I haven't used it much directly, but it is quite nice and a good piece of software in my opinion.