The advantage of percentages is they work to screen size/ resolution.
Other methods don't and a site can look very different from one machine to the next.

Lisi, I understand and respect your position but knowing other people who are
also partially sighted myself included, my left eye only has about 15% capability,
I am also speaking for myself from experience.

This screenshot is just awkward. I have a widescreen to make things easy for me,
and others who use it, so much "vacant land" so to speak with everything jammed
 in one segment doesn't make things easy for some people.

I made a suggestion I won't fuss on about it any further.

Cheers.
Michael.