I was thinking about clefs recently. Why are we so fixed on two clefs? All that a clef needs to do is to indicate (a) where the G is and (b) which octave it is

I was thinking about clefs recently. Why are we so fixed on two clefs? All that a clef needs to do is to indicate (a) where the G is and (b) which octave it is in. When I play with ideas I just put a 'x' on the G line with a superscript 4 next to it. Music theory could be taught in a way so that students learnt to find the G as a matter of course. But for some reason we've been beaten into thinking in terms of these two clefs. It might have something to do with the way a conductor reads full-score. With typesetting technology it should be mess important to have conductor and accompanist on the same clef. We're not far from a point where everything could move to e-ink. It'll probably take another century for music libraries to have been completely moved to digital.