I think it is indeed becoming an echo chamber. Everyone is holing up in their own little everyone-else-is-wrong silos including MSM, it's not just the fringe. There are a group of academics across the aisle from one another trying to fight it but I think it's a battle they can't win. Talks at universities cancelled because someone, who wouldn't even be going is "triggered", stories like this from the NYT, deplatforming people forever, etc.