There's been more recent work suggesting that planets are extremely common. Most recently, evidence for planets in unexpected orbits around red dwarfs have been found. See e.g. here. This is in addition to other work suggesting that even when restricted to sun-like stars, planets are not just common, but planets are frequently in the habitable zone. Source(pdf). It seems at this point that any aspect of the Great Filter that is from planet formation must be declared to be completely negligible. Is this analysis accurate?
Is there a wiki or website that keeps track of things related to the Great Filter?
I guess I'm looking for something that enumerates all the possible major filters, and keeps track of data and arguments pertaining to various aspects of these filters.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.