I recently renewed support for that license more on principle than because I had a need for it, and I did do the renewal before I checked the forums and came across the info about XenForo being stagnant.
Jake, I don't think you are doing anyone a favor by closing threads which are critical of how the XF team is handling the information flow to current and potential new customers. Your "current news" includes a note about Kier being back, except that he posted that note over 4 months ago.
If I had to guess then I'd say that most current (paying!) customers don't care about when 1.2 comes out. What they care about is some communication from XF (the company, not a mod, no offense to you personally but you don't speak for KAM) that assures the current and future customers that XF is still a viable choice when it comes to forum software.
Frankly, I don't believe it's your place as a mod to close down threads that request that type of communication especially when a long standing community member has pointed out that all attempts of contacting the XF team by other means to request information have failed.
So unless you are working for XF (the company) your purpose here is to moderate and to make sure that users behave in an acceptable way and treat each other decently. It is certainly not your place to block the requests for information. If you feel that you cannot effectively moderate a thread that is merely asking for clarification from the XF team because such a thread will inevitably get out of hand with nasty comments, then you are not the right pick for a mod.
Mods have the often thankless job of keeping users in check but they are never, at least in my experience, the deciders what information can and cannot be asked for.
I absolutely agree that we do not want a thread full of speculation. The solution to this issue is easy. There needs to be an official XF announcement about the future of XF. If the future depends on the outcome of the lawsuit then that needs to be stated by the XF team. Silence and obfuscation is not the answer. Informed customers are a lot more forgiving than those who are kept in the dark.