Reading TDF's "side" of the story gives me firm confidence that Collabora was in fact in the right, here. Collabora seems to have the facts on their side, which is why TDF's account here is so vague and passive-aggressive and filled with FUD.

Comments like https://news.ycombinator.com/item?id=47604892 (in particular, the mention that Collabora was not in fact intending to leave) lend further credence.