I have a cheap 1 x 30 that has limited usefulness... for anything really. Waste of money.
I also have a 2 x 30 Sorby Proedge which is a really good versatile machine, but mostly for sharpening stuff.
I shape risers on an edge sander and a drill press that I set up with sanding drums.
But I was thinking about getting a 2 x 72" belt sander, like knife makers use, to use on anything/everything. There's a tool place not too far from me that sells one that caught my eye. A Shop Fox W1843. It has a 1 hp motor, and a long 5/8" shaft off the opposite side of the motor that could be used for a sanding drum and/or disk, grinding or sharpening wheel, etc. They want $596 but I think I'd get a lot of use out of it. The whole sanding belt side can pivot from vertical to horizontal, platten can be removed, sand on the belt or the wheel. I don't know. Still kicking it around.