It's likely there is no great filter; there exist reasonable claims that the Fermi Paradox has been "dissolved" [1] [2].
Which is to say that we need to start building interstellar transport vessels soon.
Even accepting their numbers, it's hardly "dissolved".
> When we update this prior in light of the Fermi observation, we find a substantial probability that we are alone in our galaxy, and perhaps even in our observable universe (53%–99.6% and 39%–85% respectively).
There is nothing reasonable or new in either one of those links. Seems like people quoting trash is how myths perpetuate.
P.S. Wrapping a quoted quote in the same kind of quotation marks is kind of liberating after years of " 'ayyy' " or "\"ayyy\"".