This is self-explanatory, but to help you understand the reasons why many would benefit:
- For those who don't want traps, doors, tools, nuggets, etc from Base Metals.
- For those who use lighter ore mods like Hardcore ORE.
- For those who love to run texture packs. (I highly doubt that texture developers will make textures for the hundreds of items in Base Metals. And I think we can all agree that the textures in Base Metals are a bit low grade.)
- For those who don't understand how to use Craftweaker, etc. (Also, it takes quite a while to remove all those pesky Base Metal item recipes with Craftweaker.)