Just think of the COM3 tree vs. the MD1 tree in this way:
Unstable, Unpolished, Brand new features debut on MD1, get some testing, polishing, and finishing, and work their way into COM3 when deemed "worthy"
COM3 contains more up to date OS-level code...
And at the end, the trees will both be combined into one, which will be 6.5.1
