A resize option available in the command prompt > or as a bindable keeb shortcut,
that lets us set up a resize option to x chars. Once set, we have an option to resize
to set margins and it will try to resize the window such, that exactly n chars fit into
the window with an addition for the minimap if activated.

I don't know how well this may be achieved but it clearly sounds nice.

Finally similar feature could be useful for lines.
At least I have never seen that before in any other editor.