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.
Fiat currency will not be eliminated ever. We use it in a day basis in our everyday lives. Yes, we are now living in a digital world and many people now using cryptocurrency on their payment transactions but still we cannot use it at all times. Fiat is important and it has been part of our life since ages. Fiat will stay no matter what.