I don't know anyone who had complications. I know they occurred but medical care has come a long way since those days. Many of those complications could be dealt with better. And what if there's an outbreak because of all the people who are unvaccinated or whose vaccines aren't effective? Childhood diseases are pretty serious in adults. This could all backfire some day.
Trust me, the complications would still be awful. There is no treatment for blindness for example. I've been practising medicine since 1982 and have seen exactly TWO cases of measels, one when I was a med student and the peds attending called us all in because "we may never see this again".
We DON'T want to go back to the days before the vaccine was common.