I can’t remember where I saw this, but…
menu-bar-splitter: A Mac Utility for Keeping Your Menu Bar Organized is a free app that will let you add some ‘dividers’ (more on that in a moment) between your menu bar icons. This is a good way to visually ‘group’ some of them, if that’s something you’d like.
Release Menu Bar Splitter v2.0 was recently released to work with Bartender 4.
I’ve only just started using it, but I like it. I have used Bartender to ‘group’ icons anyway, but this visual indicator seems handy.
By default, you can use a vertical bar, space, or a .
to divide them, but you can also add your own images. I believe the developer has an example showing Skeletor as a divider.
Seemed like something some power users might enjoy.