My gripe is that swapping out sugars for fake ones doesn't seem healthy long term regardless of any direct impact aspartame itself may have. Just have less sugar imo.
Edit: didn't realise how controversial that soft opinion would be lol. Look, drink what you want but I'm going to stick with water unless it's a treat. I know it's not healthy for me to scratch the dopamine itch with sugary tasting treats all the time; fake sugar or not. My perspective is less about trying to say, diet soda is bad but that there must be better alternatives to suggest than just sweetener filled copies?
People forget that it was the bakers that got it first at the start of the French Revolution.