It's the taste, yeah. Frankly I don't care much about what's "healthy" and I consider that to be a bit of a buzzword as well as a rabbit hole. I do eat a lot of veggies, don't eat meat/dairy anymore, don't drink alcohol, but in my mind I'm not doing this to be some health-freak. Alcohol tastes bad, for example, and I have very low tolerance for that sort of thing. A lot of people will assume I'm religious (I'm not) or otherwise ascetic, but I'm actually just doing what I want. It keeps life more interesting. If we're to look at an energy drink as a fun thing, a pleasurable treat, I think sticking sucralose in there completely defeats the point. I can drink water if I'm thirsty, I can get caffeine from other sources. I wanted the energy drink because it was good. If you make it not good, I'm not going to drink it.