Accelerating the switch to NACS on the car side won't work. The unspoken part of "automakers standardize on NACS" is the update to the Superchargers themselves. The signaling is basically CCS, not the legacy Tesla protocol.
Great. Then ship cars with CCS and a (not quite ready for supercharging) NACS port. A programmable PHY that’s adequate to speak the protocol should not be especially complicated, especially if it’s essentially the same thing as the CCS part. We’re talking about maybe $50 for the jack, a few dollars for muxes, and some relays.
Sure, this would add maybe $100-$200 in BOM cost during the transition period. But I think that’s better than failing to produce credible cars at all. And then the cars could be sold as “already compatible with Tesla level 2 chargers and ready for Tesla-compatible supercharging with an OTA upgrade”, which is a lot better than “not compatible, and we’ll probably have an adapter available next year for an unknown price.”
(The adapter will surely cost more than the added parts for an extra jack. An external adapter would need to make all the protocols work and may also need a relay to switch between AC and DC modes.)
Sure, this would add maybe $100-$200 in BOM cost during the transition period. But I think that’s better than failing to produce credible cars at all. And then the cars could be sold as “already compatible with Tesla level 2 chargers and ready for Tesla-compatible supercharging with an OTA upgrade”, which is a lot better than “not compatible, and we’ll probably have an adapter available next year for an unknown price.”
(The adapter will surely cost more than the added parts for an extra jack. An external adapter would need to make all the protocols work and may also need a relay to switch between AC and DC modes.)