Fair play. I definitely wouldn't feel good recommending money.js for any application where people live and die by the 8th point of precision on an exchange rate

Fair play. I definitely wouldn't feel good recommending money.js for any application where people live and die by the 8th point of precision on an exchange rate, if you know what I mean - but it's a solid solution for estimates, price conversions and most enterprise software - provided that appropriate disclaimers are given (i.e. "converted prices for informational purposes only") - everyone should cover their arses. I agree with you though, that there will be the 1% of cases where something a lot more reliable is needed, but I imagine that's when you call in the CS heavyweights.