Maybe these gaps should be filled with decoration. Like with ornaments similar to those you can find in medieval books.

To each their own. <3

Oooooo, window borders that look like an illuminated manuscript?

I need this before I screenshare into my next Teams call...

I agree. For me the point of a tiling window manager is that it efficiently uses the screen space automatically. I don't have to drag windows around to do it.

Automatically wasting space sounds less attractive...