All the multimeters I've seen had pretty bog standard markings for AC and DC resistance, voltage and current. While not an electrician myself, I think one would be pretty annoyed if a "designer" invented new graphics for alternating current or resistance. They might even gotten hurt or damaged some equipment.
So when consistent UX is applied, both a professional and amateur alike can learn and trust that what they learned carries over.
So when consistent UX is applied, both a professional and amateur alike can learn and trust that what they learned carries over.