I think doing away with cash is a terrible idea. That said, I'm using it less and less since 2020. Inflation is the real problem--we need a stable currency and make the small denominations valuable again. All this tracking and surveillance is bad for a free society and it ends with "programmable money" where the government can tell you what you can and can't buy with your money. That's sick and evil, particularly when we know that people in government are the most immoral, pernicious, and downright evil people who ever lived.