I can see 1/10 guys who don't want too spend too much $$$ buying new lipos, charger, esc, and motor slapping on a 1/8 buggy body, wheels, and tires, and entering a 1/8 buggy race. The dimensions aren't a whole lot different other than the fact that it will ride higher.
Check out my custom converted 8ight:
Sub 7lb, lowest CG of any 1/8 buggy