Worse, JPGs mean that every time YOU save the texture, maybe you modified it a tad, or needed to add a tiny modification, or even if you don't change it at all but resave it. JPGs also can't suppose alpha, so even if your model isn't using alpha (to be honest, every model should have team color at least somewhere, and its a bad idea to split textures into too many files, as that makes a mess, tends to eat more space, and overly, should only be done if you need to toggle between transparency and team color).
