It was probably the other way around - I'd guess they pushed Mir forward because they didn't want to release an early version of Mir in a LTS release. X will b

It was probably the other way around - I'd guess they pushed Mir forward because they didn't want to release an early version of Mir in a LTS release. X will be with the Linux community for the foreseeable future anyhow since there are plenty of distros that insist on using outdated^Wstable versions of applications.