BTC1 is not months behind. They track Core 0.14 for the production branch, and Core 0.15 for the dev branch. They have not moved to 0.15 because of bugs in Core

BTC1 is not months behind. They track Core 0.14 for the production branch, and Core 0.15 for the dev branch. They have not moved to 0.15 because of bugs in Core (not BTC1!) https://lists.linuxfoundation.org/pipermail/bitcoin-segwit2x/2017-October/000582.html https://lists.linuxfoundation.org/pipermail/bitcoin-segwit2x...