It happened with the transition to 7th edition. The rules of that edition made "soup" armies (mixing multiple factions in the same army) commonplace, making it difficult for members to discuss their armies when they incorporated factions that weren't previously allowed. In addition, discussion forums dedicated to various factions were dying off (all online discussion forums are seeing this to a degree). Kurgan the Lurker was the driving force behind this expansion (and that's not placing blame because I fully supported it). It was a somewhat contentious issue, but in the end we decided that expanding the scope of the site to cover the entire setting would best support our mission statement and the community's needs.
Given that we have moved away from that ediiton, and soup armies are a thing of the past - maybe we could remove these sections now? To bring back the old spirit of B&C.