Something I worry about: is how any position that is not extreme will get invariably get “primaried” by those with more extreme positions in any online debate. 

They will attract more energy , easier to get social capital and also plays well to most online algorithms. 

Having the center get and hold energy seems an unsolved problem.

Maybe disdain of either extreme? The extremes use polarization, I feel like the center also needs a polarizing stance to attract users, which is obviously hard if you’re in the center. But perhaps a rejection of both left and right could work, particularly as the vacuum in the center continues to widen