User blog comment:MisterWoodhouse/The first migrations to the Unified Community Platform/@comment-30782076-20201229213709/@comment-1038387-20201229214255

Not sure. It may have looked like a smart idea at the time. Fandom (or then, Wikia) had needs that the vanilla code couldn't cover, as it was built for a non-for-profit layout. It may be that Wikia needed ads and trackers and cookies as that was perfectly normal back in 2013. But over time, the technical cost of maintaining your own software alongside a vastly improving off-the-shelf variant will make any company reconsider.