I'm all for never overestimating the technical literacy of one's users, but .. really? The average person doesn't even know they CAN zoom? That seems an "ignora

I'm all for never overestimating the technical literacy of one's users, but .. really? The average person doesn't even know they CAN zoom? That seems an "ignoratum too far", like not knowing they can alter the volume on their stereo. Average desktop user does not know how to zoom. I have done hundreds of usability tests and user observation in my time - the number of folk who know how to zoom text is vanishingly small.