When the Euro was introduced, I've heard people say things like "older generations will never adapt to the new currency, they'll always refer to the old denominations in their head" – which turned out to be completely untrue.
Adapting to new units is very possible, but it needs a concerted effort. Absent a good inherent reason or anybody capable of artificially creating one, it won't happen on its own.
Wasn't arguing otherwise. If anything, I was illustrating so: I used inch so much, that despite it not being the native unit of length measurement over here, for the specific purpose I used it for it managed to stick incredibly hard.
Adapting to new units is very possible, but it needs a concerted effort. Absent a good inherent reason or anybody capable of artificially creating one, it won't happen on its own.