Some might say it’s giving finger counting too much thought, others might say it’s a tangent too serious for dad jokes, I say… the efficiency gains seem to come from a change in technique for how a count is stored.
Base-10 finger counting technique just accumulates, the number of fingers held up is the count.
Base-12 uses a pointer (your thumb) to point to a value (a knuckles or finger segment).
Base-2 uses a finger up or down to show a place value as one or zero.
You could tattoo numbers on your forearm so all five fingers from your other hand could point to a value for up to five more places to point.
Some controllers are almost integral to the experience. Intellivision and Colecovision come to mind. Having said that, emulation and modern controls are generally great, and generally my preference.