One columnist I read said something like "it will be interesting to see what historians make of the fact that a global economic policy was driven in part by an error in an Excel spreadsheet".
It's rare that we get such a clean natural experiment like this in economics; maybe future economists will thank R&R for cleverly introducing this negative exogenous policy shock (sarcasm).
Austerity was a big thing in Europe, and they mostly came to that decision before R+R's paper came out in 2010.