I literally use this once for every map I make. everything else is a shift+drag copy, and if i need another cube and only have angled brushes, i clip the sides straight.
another shortcut i only learned recently which is sometimes useful - hold space and drag to pan the 2d viewports. for years i've been zooming out and back in again to pan around, so that can save some time.
Makes sense, I do the same a lot of the time.
Nice find on the 2d view port thing, I also always zoomed in and out with the mouse to move it around never really thought about it.