I don't think the purpose of the High Resolution Texture Pack was to be extreme, but rather to even out the experience. User mods will always be able to develop more demanding content, if only because they don't have to worry about being too demanding for paying customers to run. So, that's why we have 4k & 8k texture sets.
I prefer the original textures with the extra resolution for now. Maybe I'll try one of the fancy ones out in a few years.