Certainly good to do if you have a Variac available.A practice I adopted in days of yore was to do every first smoke test of any line-powered gadget with AC supplied from a Variac
No slow electronikers allowed.With only ~1/10th second between 80V and 90V, seems a pretty good reaction time would be needed to use this method!
But it would need to go some above 100V before it starts stressing C2.