[rektide]

Efficiency for whom? This works great for me. You'd make my experience awful by making things bigger, reducing information density.

[kwhitefoot]

Surely CSS can detect and cope with screen sizes.

[aendruk]

The issue here isn’t screen size.

  @media (pointer: coarse) {
   /* UI for fingers */
  }

I frequently use small viewports on my laptop and the pervasiveness of this misconception drives me mad. I try to fit more information on the screen and websites respond by spatially bloating as if designed to impede.