After I got used to working in windows instead of full screen all the time, I can't really go back. Even on Windows I find myself working the way I do on macOS. Full screening every app made more sense on a 1024x768 screen (or smaller). Once I moved to a widescreen display (which happened to coincide with getting my first mac) running full screen felt like the wrong move most of time.
Web pages would look something like this:
| <- whitespace -> | <- content -> | <- whitespace -> |
| | Lorem ipsum | |
| | dolor sit amet, | |
| | consectetur | |
| | adipiscing | |
| | elit. Morbi | |
| | convallis ante | |
Making the window smaller meant less wasted space and less blinding white space. Once I got used to that idea, it carried over to most other apps.