If they can do this with two qubits, why not 4? Why not 8, or 128, or 512?
I think neither of you is giving Gates enough credit... most of the first wave of personal computers, including the Apple II, ran MicroSoft BASIC
The Apple I & II originally ran Integer Basic, written (on paper) and hand-assembled entirely by Woz.
Real programmers don't write in BASIC. Actually, no programmers write in BASIC after reaching puberty.