Yes, you want to take creatine and beta-alanine together because, like I said, those mechanisms by which they work, when you add them together, you have more endurance, you have more strength, right? You're able to train harder for longer, and that's going to lead to better results. Now, why do many pre-workouts leave out either one or both of these? Well, it gets down to not understanding the science behind the ingredients, right? What they do, when they do it, how they do it, what's important for taking them together, right? But then really it comes down to price.