See how well that went for El Salvador:
https://www.nber.org/papers/w29968
(not well)
https://www.nber.org/papers/w29968
(not well)
Reminds me of people saying Bitcoin failed as an inflation hedge over the past 1-2 years while ignoring the success of the hedge over a 10 year period.
Unless your definition of "well" is that everyone would just up and stop using fiat overnight.
Does ycomb actually think these nations would be better off with colonial currencies that have maintained poverty and exploitation for centuries? Probably yes.