There are several reasons. It is very hard to talk with the main developer and he hardly answer the emails. Last time it took 3 of my mails for getting an answer. Now its been two weeks waiting. I have seen you can buy linuxmce builded systems from the internet. I guess he is busy. Also, the source code havent been updated since the begining. The kubuntu version isnt there. When I try to install linuxmce I get a lot of bugs, and cant build from source, cause the source is old.
Good luck with this project