Should there be a supertruck category? I know there is a supertruck alpha category but there isn't a supertruck full version category.

Pretty sure the only reason there was one for the alpha was because technically it was a different game. Supertruck runs are not actually interesting to run or watch, as you make literally 0 use of the whole time-stops-when-you-stop thing, since if you stopped moving, it would be slower. The only thing that could be considered "special" about it, is that it means you can't use the portable truck, which means no portable truck boosts, but even then, the category would be more interesting with a different required utility.