Why no "First place falloff" for BAC?

So when Crown won in 2013 and Bluecoats won in 2016 it was monumental for those organizations, winning their first (And for crown, only) founder's trophy. it also predicated a fall to fifth place for both of them -- and that wasn't with a major design staff shakeup afterwards. Boston has a new designer at the helm. So.... What is behind the sentiment predicting they are going to stay on the podium?