From what I have seen so far in this forum and other crypto platforms, most of us want fiat eliminated. But let us not forget that there are still situations whereby we can't use crypto except fiat like in rural places without computers or even internet facilities.
We can't really eliminate fiat nor destroy fiat because here in my country there are some places that don't have any internet connections just like rural places as you've said and there is also a person's who don't have the capability to have an internet connection at their home so if we eliminate fiat then it would be hard for them to have a money. In some reasons we can't totally adopt as much the crypto because there are some people maybe the oldies who are not aware of this and they just aware on the money that is a piece of paper as a currency it would very hard for them to adopt this very fast. So we can't abandon fiat for now or even in the future.