My only guess is they have a parallel skunkworks working on the same thing, but in a way that they can keep it closed-source - that this was a hedge they think they no longer need, and they are missing the forest for the trees on the benefits of cross-pollination and open source ethos to their business.
Worked fine for MS with Excel supporting Lotus 123 and Word supporting WordPerfect's formats when those were dominant...
https://en.wikipedia.org/wiki/Embrace,_extend,_and_extinguis...