Earlier quoted context omitted.
I use i3-wm I never resize a window with its border. I never minimize a weindow. I sometimes move a window to a different panel but it snaps to the width / height of the column. Overlapping windows is perhaps the worst GUI paradigm - it's like the first thing someone thought of for 640 x 480 screens. Let it go.
Tiling window managers used to be a thing in the old days, they predate the invention of overlapping windows, there is a reason it is only a minority that reaches out to them nowadays.
Complaints about lack of window snapping in MacOS vs Windows, a loose copy of tiling, are consistent across the internet. If MacOS and Windows had native tiling support, you'd see a fight fiercer than tabs vs. spaces.
The reason floating windows are used is because "that's the way it is done." Windows 95 wowed the world and established the status quo.
Not to mention the direction that the likes of Paper and Niri are going, these are things that very few users get to experience and therefore couldn't possibly have an informed decision on what they prefer.