Mechanime 1963-1980: Haha big robot fights monsters and EEEEEVIL mad scientists! (buy our toys, kids!)
Mechanime 1980-1995: Imperialism and war fucking suck, we need to create a better society where it won't happen anymore! (SUNRISE: buy our toys, kids!)
Mechanime 1995-2006: Have you heard of a show named Neon Genesis Evangelion? (buy our skimpy-clothed figurines, otaku!)
Mechanime 2006-Now: 50% chance it's right wing nonsense and 50% chance it's trying to recapture the golden age of Mechanime and is unlikely to have succeeded.