Ah I understand what you're saying. That was the only way to multitask on the Mac on System 5 and 6. Even with System 7, using the _hide others_ option was common, which is still there today.
Even on big screens, I like MacOS's two level cmd-` to cycle between windows in the same app and cmd-tab to cycle between apps, and App Expose (4 fingers down on the trackpad). I know what I want to find is in another browser window or spreadsheet window.