Does not matter Core implement it or not. BitcoinXT will be on the longest chain as it will be compatible after the fork.
So if you support BIP101, you will support BItcoinXT. Even if XT nodes arent majority, It will just be an alt wallet client.
Thanks for clarifying. So XT will be compatible either way?
I am not sure if the size increase is much needed or not (just learning about it through you guys
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)
But Core will not move if it is not forced, and this letter makes pressure. No doubt about it.