PROBLEM
On a normal display, most anti-aliased display modes still produce quite a lot of aliasing on Blender’s current colored outline styled edges (seam/crease/sharp). It creates almost a moire effect which is difficult to read. On a 4K display the colored outline of a edge blurs too much with the center edge, reducing the color saturation and value of the overall line:
SOLUTION
Allow more granular theme styling of these effects, with more thickness options:
(Naturally, the repeating words should be gathered in a headline, but I was in a hurry.) 