How about gravel? Fill? A yard of mulch? Manure? Construction debris?
Indeed. When is was remodeling my house, I bought an old van for €2000,- (the successor to the C15, actually) *
I had no compunction to fill it with debris, earth, sand etc. but that’s not something your European tradesman does. He uses a separate trailer.
* https://upload.wikimedia.org/wikipedia/commons/1/1d/2005_Cit...
My minivan has more 50% weight capacity than a Toyota Tacoma. I can haul more construction debris and load/unload them easier because my tailgate is lower. I wouldn't want to try to haul mulch or manure though. That being said, most of my friends with trucks have caps on the back and can't haul mulch any easier than me.