Yeah Jeff we use that joint even on the most expensive yachts. I have seen it used on a 20 inch wide plank, 3 inches thick running the port and starboard sides the entire length of a 94 yacht. That was the gunwhale and of course it was rounded over and tapered and made of teak.
I watched 1 guy hand plane, then sand and finally apply epithane that gunwhale over the course of a year.That was all he did. It took forever, but when it was done, it was a gorgeous piece of woodworking with every splice done as you mentioned.
I have no intention of traveling from birth to the grave in a manicured and well preserved body; but rather I will skid in sideways, totally beat up, completely worn out, utterly exhausted and jump off my tractor and loudly yell, "Wow, this is what it took to feed a nation!"