Oh! I haven’t used the shop bot in years - so you’re saying my Onshape designs might by fun for 3D printing but it’s no good for people wanting to use mills, tormach, shopbot etc?
I also feel fine learning multiple CAD systems, they all have a little overlap. My Fusion 360 classes here at MakeICT were my foundation and then Onshape was easy because the differences weren’t that crazy.
Learn to sketch and extrude.