BitcoinXT is not the same as BIP101. BitcoinXT is a software repository. BIP101 is a proposed way to rise the limit. If you don't like BitcoinXT, you could implement BIP101 yourself by patching BitcoinCore.  BitcoinXT will remove the BIP101 code, or replace by some other BIP, if the community were to reject BIP101.  BitcoinCore will eventually implement BIP101, or some other BIP, if the community maintains their support for it.