The Extrude auto booleans looks so sweet, thanks for the new beta !

Just wondering, can't this push/pull be the normal behavior when you sub-select and drag a face ? so you don't actually need to use the extrude command ?

I'm asking that because I have half read the beta log. I just lauch MoI, create a cube, and my first thought was that I could just select and drag a face. Seems very natural too me, I had to come back on the forum to undrestand I have to use the extrude command.