What is stopping Neotel to put in their own last-mile? Nothing except cost. They do not think they can do it cheaper than they will be able to get it with LLU.
Telkom did the vast majority of the copper network rollout years ago when copper cost a fraction of what it does today, and at rate of copper theft in SA, they will be fighting a losing battle, it's alot more difficult to steal a radio comms tower... I'd say the ultimate solution is fibre to the premise... not much use stealing that...