Transform element and metric system

I can use the metric system in SVG design for all purposes except the transform element. Why?

If I want to place something at x=85% y=30% I can't, using transform. I have to stop, pull up a percentage calculator and then compute the pixel value based on my viewBox. In less time then the thought, the computer can do this. Am I wrong to think this is a waste of time, resources and just plain stupid?

If anyone has a backstage pass and can go behind the curtain and ask the wizard why this is so, please do.

If there is a legitimate reason I would love to know.

James



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