I thought bitcoiners were supposed to have low time preference. Why would I expect a revolution of this magnitude to take less than 20 years?

Adoption and use are clearly growing, not shrinking. "Making the switch" doesn't have to be a complete binary. There's plenty of room to do more business in bitcoin.

Growing interest in using bitcoin for SoV is a very odd sign of failure, since part of the pitch is that it's the best savings technology ever.