My experience has been different.
I worked at a place where we had German machinery rated 220 volts and we operated it without issue at 208 and likely even lower.
We also beat the heck out of these motors, at least 10 or 12 very hard starts every hour. No issues with burnt motors or controls.
Now that said I suspect the difference may be in the age, the equipment I was working with was all from the early 1970s, perhaps they used to build equipment a bit more robust back then.
It certainly did not have anything 'electronic' on it, all basic motor starters and mechanical timing relays.
I do agree with electures comment about providing the correct voltage if you want to keep your warranty.
