Bees are like turtles. When it comes to fast, they aren't it.
One thing I like about bees is the ease of automating them. They're all contained in an easily interacted with block, and all the machines are designed with sufficient intelligence you won't end up sucking out your inputs, or feeding them something that will gum up the workings. Yes, you can Atomic Reconstructor Quartz into Prismarine, but you have to drop it into the world, and then fire, and pick it up again, and if you automate that you run the risk of accidentally grabbing it with a magnet and screwing up your system.