Huh. Hmm. Pondering.
My first thought was that at first glance, 10mΩ shouldn’t be an issue in a 4-wire connection, since the whole point is to eliminate the influence of resistance in the connections.
Then it seemed to me that you might actually have a 4-wire connection to a switched array of 2-wire connections, where the switch adds resistance and uncertainty, as it’s part of each resistor.
Then it occurred to me that if you had enough switch layers, three I think, you actually *could* switch a bunch of 4-wire resistors, eliminating not only the resistance of the switch, but the variability of it. It seemed to me that it might result in a more confidence-inspiring standard.
But that’s just pondering!