Parler depends on what twitter does and how far they go. Banning Trump is a Rubicon that even some anti-Trumpists or some of those disgusted with Trump's behavior (like myself) can't support. If not Parler, it will be a different app. Conservative thinkers like Ben Shapiro have been circling around creating different conservative silos to engage in the cultural war....some things like movies and universities are harder to recreate due to structural impediments in the markets. At least with Parler, they have a platform up and running, but I do agree they'll be challenges with respect to Parler's own structure. This does feel like a watershed event to me, though, and my gut has generally been right about these things. It's another step forward towards separation, and like I've been arguing Trump is the dam not the river (things don't get better because Trump goes away and if Biden is thinking that way it sets him up for failure).
Biden has some very deep structural issues, including foundations in the economy which are very weak as the result of the pandemic, which he is facing. He will either go down as one of our greatest presidents, or his term will be ...what's the word...Buchananesque....he has to be Lincoln or he'll end up being Buchanan. Given his own physical and mental limitations, and the fact his allies don't seem to be doing him any tactical favors, I'm not particularly hopeful.