I'm really happy with how this project turned out, in part because I wasn't following any plans, and that can sometimes lead to a wonky build, but also because it's a fully functional semi-portable (has casters but is heavy to move when fully loaded) miter saw station that has tons of additional storage.
Unless you are storing loads of wood in your shop, in which case you'd want dedicated lumber storage, I don't see any reason why anyone wouldn't combine these two pieces of shop infrastructure ever again.
Step 1: Plans
Here is the sketchup file.
It's not an exact reproduction of what I built, but it's pretty darn close and even has some improvements included in the design.