The hotkey to allow move and resize from anywhere in a window is my favourite *nix window manager convention.

Windows finally implemented it via PowerToys: https://learn.microsoft.com/en-us/windows/powertoys/grab-and...

Even back when we had much fewer pixels on most displays, people knew 1px drag targets were a bad idea. Some UIs dos have single pixel borders, but tended to have extra decorations at the corners so there was something larger to interact with there, and/or implemented something like a control key making any point in the window a size/move target.