More customization/options for page width (normal, wide, full-width) including daily notes

normal /standard layout often seems to thin on big monitor (wasting screen estate / feeling 'thin') – while wide layout feels too jammed for me, as it almost has no breathing space (margin)...

... could there be an option for a golden middle (like min 440px / 70%, or any other middle)?

would greatly enhance comfort zone (and likeability of use :-) )