Not very profitable for mining operations to switch to BCH, saw this coming from a mile away.
Probably not now but could occur a difficulty adjustement in case of hashrate drop, besides as it is mentioned somewhere: the hashrate supporting the chain is dependent on market price and hard to predict.In order to make sure the chain remains viable no matter what difficulty needs to adjust down in case of abrupt hashrate drop,then maybe it will only take more time to be profitable.