Scott,
I probably have used my SB as a planer (or more correctly, a board flattener) hundreds of times. It's so incredibly satisfying to take a warped and twisted piece of lumber and turn it into a precision material. Typically, I'll use the SB to get the material within a few thousandths and then run it through the belt sander to get the board to a precision thickness with a good surface.
Nothing helps a project more than accurately flattened and dimensioned materials.
ShopBot Details:
2013 PRS 96x60x12 (Centroid upgrade)
4hp Spindle
12" indexer
Aspire
Rhino
Fusion 360
Ferrari 360
Prusa MK3S+
Prusa XL multi-tool