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 elliminate fiat no matter what we do. It is a part of our system that we cannot replace. No matter how advanced the technology is, fiat would always be fiat and it would be hard to elliminate it because it is well known better than any means of payment transactions.