Do you care to explain why the devs of clients would continue to have their clients remain compatible with a coin that (hypothetically) is not used?
Bitcoin XT altcoin will not be widely adopted and I also don't see why would devs of clients change their clients to be compatible with a new coin that (hypothetically) is not used!
I think whichever is superior will ultimately be adopted (assuming that XT coin ever comes into existence) and right now I believe that Bitcoin is superior
The Bitcoin XT altcoin will come and die as many other altcoins because Mike and Gavin don't understand the difference between monetary system and payment system. They offer simplistic technical solution to pure economic problem. What they're trying to do has the potential of harming Bitcoin in a major way.