RatAssassin
Rank IV
Enthusiast III
Well sure. Some stuff needs the most protection. Good boxes are worth it. I have a few for some high $$$ stuff.But , but, but what about fashion? I do own Seahorse, SKB, And Pelican Boxes. They ride inside, the stuff in mine is far more expensive than the cases. Please feel free to you and do what you want. I had a wooden box on a sedan 40 years ago for hauling stuff. It was know as the wedge. It was NOT fashionable.
I'm just saying there are alternatives, as you found out from your plywood box, that work as well if not better. Especially the shallow boxes I see on most racks.
The aerodynamic rooftop cargo boxes give more flexibility due to just configuration.