I installed Ubuntu 14.04 and saw that it showed Ubuntu 13.10 while installing. I could confirm I installed Ubuntu 14.04 when I did this on a terminal:
and got this as output:
Distributor ID: Ubuntu Description: Ubuntu 14.04 (Developement release) Release: 14.04 Codename: trusty
So are the development versions directly cloned from the previous stable releases? If yes, doesn't a radical change like the change to Mir from Xorg be difficult to implement since the underlying platform itself change?
P.S.: I am not sure whether this should be on AO, as this is a question on development release but then such questions have no scope to be asked anywhere else.