So it's not about network effect any more now that it's been pointed out that cash had network effect until it didn't?

As for Nakamoto Consensus ... Bitcoin isn't even private, the government can trace your BTC and blacklist it from being spent. Or maybe they'll confiscate it. This is one possible example of future use-cases making Bitcoin antiquated.

All technology gets antiquated as time change. Bitcoin is not shielded from technological advancements.