Ach and bank wires cost me nothing, iBAN costs me nothing, payconiq p2p costs me nothing, all are roughly instantaneous, except ach which is still same day.

So you have friends that you transfer crypto to if they need to purchase something at a shop and don’t have the funds?

God that whole process sounds painful.

In the Uk we would just transfer the money across with a bank transfer as all banks support instant transfers which have no fees (including between banks).

I'm not anti crypto, I simply argue that the problems alleged by OP don't really exist except in the mind of people who once had a bank twenty years ago. By and large, if I want something that holds its value pegged to the US dollar, I hold a US dollar. Moving a US dollar costs me nothing anywhere in the world. Moving a USDT or whatever means I now have to set up an exclusive banking relationship with someone I trust even _less_ than my bank. Maybe it solves a problem for some subset of the globe, but I'm not convinced their problems are the noble ones stated above.