Like bitprim which shoot up 500 cloud nodes and went back to ONE again? Nobody uses other implementations and ABC controls BCH since beginning ignoring everyone.
Only because a majority of BCH hashpower believes their development roadmap is superior. Another implementation can take the lead if they can convince the market/miners.
The concept of "Bitcoin" in itself thanks to all the forks is. Not bch (controversial changes : checkpoints, ..) neither all other forks (btc, ..) Dev decentralization comes with forks
I like that you say "market/miners". Market value of a chain will decide what the miners will mine - except if miners go against profit which is likely not to happen.