Why not? Hoppers are much better, they suck out and insert items intelligently.
They basically replace Pipes + Gates or RP Tubes + Lag for dumb operations like Ore Processing set-ups in a lag-friendly manner. No longer blindly piping items out under the faith that your furnace isn't full, and have a bunch of ingots floating around in the world. And RP Tubes are not lag-friendly _at all_.
Something that would long since have been considered "OP" by many, an intelligent transport pipe, is in vanilla MC. And all in one block! End of the world!
/Insert report of GregTech planning on nerfing the Hopper recipe using Nether Stars
Yeah, they're ugly as sin. But what in Minecraft isn't. Besides, Optifine always fixes that.