I tought that too but the fact that bitcoin unlimited and bitcoin xt never won over the miners on btc chain gives me pause. The miners didnt move because the businesses didnt.
what mining power did/do XT/unlimited have compared to: CoinGeek, SBI holdings, bitcoin.com, viaBTC, BMG (nchain/CGeek) plus that 'other' grey area.
Maybe, anyway I think the more clients the better. It should be extremely easy for businesses and miners to switch clients. Hopefully this will help that.