I think the thread title is too generic. As titled it's destined to be 1000s of pages.
Two paths as I see it:
1. Rely on mod/mods to tease out individual topics after most of the dust has settled (which is the model we're apparently using mostly these days).
2. Somehow restrict content additions to broadly titled threads like this one. Perhaps socially (with mod followup) or technically (via forum software settings) limit posts on this thread to ones that introduce timely topics via a link to a new thread.
An example:
Approach 1
1. Elon speaks in Antartica about whatever and uses the word Tesla at least once.
2. People discuss the topic of Elon's Antartica speech.
3. People discuss the appetizers at the speech.
4. People discuss the impact on the stock.
5. People discuss the impact of 1,2,3,4 on the thread.
6. People chastise each other for doing the wrong thing in this thread.
7. Mods tease out 1,2,3,4,5,6 into other threads.
Approach 2
1. Elon speaks in Antartica about whatever and uses the word Tesla at least once.
2. Ten people post a link to a new thread titled "Elon speaks in Antartica on 2013/10/22" in this thread.
3. Discussion directly, indirectly, and barely related to the speech and event continues in the ten threads from #2.
4. Mods merge the ten threads from #2 into one thread.
I'm not sure which is better, but I think those are the two most straightforward choices.