No, for finance at large floats are often fine. Plenty of financial calculations cannot be done precisely using fixed point or arbitrary precision numbers eithe

No, for finance at large floats are often fine. Plenty of financial calculations cannot be done precisely using fixed point or arbitrary precision numbers either, so there's no point giving up the performance/ease of use that floating point offers. Billions of dollars is transacted based on Excel calculations every day, this whole fixed point for finance thing is a programmer myth. Of course as you say for accounting you don't want to use floating point, but I can't see anything like that in this application.