Problems ethanol causes in vintage cars?

Interesting- we've had ethanol in our fuel for at least 20 years around here. I hadn't touched a fuel system component (other than the filter) on my '67 barracuda for 30 years, until I replaced the fuel sender, fuel pump and all the rubber hoses last year. None of the hoses seemed degraded, fuel pump replacement was just-in-case, not due to failure. Clearly, YMMV.