We're not building pianos here! Having built boxes for some 50 years or so, both beekeeper cut and factory cut, I'll go out on a limb and say that rabbetted boxes last just as long as box joints if glued and stapled with sheathing type staples, 1/2" crown and 1 1/2" long. Paint them and make sure to give them a real good coat at all the end grain areas, especially corners and handles, and they will last a long, long time. When you're building dozens or hundreds at a time you don't have time for metal corner braces and linseed oil. Get the dang things done and get bees in them!