[fernandopj]

> Fiat currencies don't fork

Another situation: in Brazil 90's, inflation was rampant and a new currency was being planned. But, until BRL was printed as the final currency, a few "forks"/new money were introduced, like URV (for one year), which set the market value for the new BRL, something like 2500:1 old-money:URV then 1:1 URV:BRL. So, the analogy: a fiat fork did happen and a two-currency system was put in play, until the "miners" decided to ultimately put the hash power into just one fork.