I agree with bondo I plan on building a new workbench and that’s a good idea making one side or both with legs even with the edge of the top for being able to clamp big pcs to the side of it. In my opinion a bench is just a really big tool depending on what type of work you plan on doing. You don’t need a bench with a 6 inch thick top and motice and tenon joints for just a basic work table but… if your going to be pounding or want something you can put small power tools on and don’t want it bouncing plan accordingly by all means.
I’ve always felt you can never go wrong over building a little more than you think you might need

Mark DellaCamera