Googling Aspartame on YouTube yields hours of fun entertainment, like this one: https://www.youtube.com/watch?v=yCoBuTr0Or0
I'm one of the chemically sensitive crowd that can't tolerate any exposure to many food chemicals like chocolate, caffeine, ginger and many drugs. They cause mood disorder effects not limited to depression, hypomania, confusion, disturbed dreams, social anxiety etc. Without exposure I'm pretty darn normal. With exposure I am almost immediately disabled, and legally was for many years before I figured it out.
I've always avoided Aspartame as a matter of course, but from my web research it's very likely it is in the same category. Not having foods labelled with it would be extremely hazardous for people like me.