I think this is the most popular setup for tiling window managers, I use my terminal windows in this configuration as well (on a separate display). However, on my main display, I can't imagine going like this, most because:

- macOS "Zoom" functionality already takes care of the optimal content size.

- For websites, above zoom functionality works fine, but I prefer to manually resize my browser, since nearly all websites today have responsive design, and resizing gets rid of all the unnecessary parts, like sidebars, large margins etc. All I have left is the content.

- Today most application GUIs are way too bloated. I usually disable whatever I do not need, and use the macOS global menu search functionality a lot. I can reach any feature I want with a few keyboard clack. This way I can use software with minimal screen estate.

- If things get a bit crowded, Mission Control (Exposé) feature allows me to see what's going on very easily. macOS trackpad features also help a lot, with intuitive multi-finger gestures to see MC, show desktop, or show individual application windows.

- As a personal taste, I like to take the desktop metaphor a tad more seriously. I like to have file clusters on my desktop without the limitations of a grid, and file them to a folder later on when I'm done. Imagining my desktop as a real desktop just makes me more productive. I really cannot imagine myself using any other system other than macOS or Haiku just for this reason.