10 years is a long time, almost the lifespan of most cars. By that time there will be very few exceptions. Almost every car and every charger will be NACS.
But “good enough” will happen much sooner, where most cars can use NACS (via adapter) and most stations will have adapters to J1772/CCS.
At 10 years, I expect most stations will stop having adapters, since few cars will need them.