Depends on whom you ask, but this case had a major effect on removing restrictions:

https://en.wikipedia.org/wiki/Marquette_National_Bank_of_Min....

Prior to that, usury laws existed in most states that restricted consumer loans to something like 5-13%.

Personally I don’t have an issue with the concept of interest itself, but if you look at the huge amount of Americans in debt paying 20-30% on credit cards, it certainly seems excessive and usurious to me.