Something like this would be bizarrely easy if you had the ear of the right person. (i.e. someone who would tell legal etc. "you gotta do it" when asked)

Reason why is, it's a feel-good thing that aligns well with Old Google values, and Google's not yet old enough for "Why bother doing anything at all?" to be an acceptable vocalized response.

It has standard, if not worse, dysfunction with internal conflict at this point. But there just isn't room to come up with a good reason to not open-source the decade-old OS.