I leveraged scaling and kind of played with different options of it.
For developers working with proportional code - unless you have super sharp eyes to scale your Sublime Editor to sub-1mm characters - i don't see it making much difference.
I physically feel comfortable with a text character of a certain minimal size. Beyond 4k it really doesn't matter how many pixels or colors are used to render the font or image on 15" screen. Making it too tiny or super-true-color-ish doesn't make much difference on a laptop screen that typically only used for "temporary" on-the-road work.