Actually, last time the greek alphabet changed, it was not a revision, but more like political statement, after a turbulant period by a military junta. The conflict goes back a couple of centuries, after the Greek revolution and the need for a "pure" and united, at least linguistically, nation. In a nutcell it was Purists vs common people. If anyone is interensted, this debate is called the "Greek language question". https://en.wikipedia.org/wiki/Greek_language_question