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?