Even though this is not about Mayer: Even in the 1970s our music teacher, Armin Schibler for those familiar with Zurich, made us spell "Sinfonie" and scolded those hard who used the pompous quasi-Greek letters y and ph.
I admit: To this day I find the spelling "Symphonie" (in German) unduly pompous.
I admit: To this day I find the spelling "Symphonie" (in German) unduly pompous.