[whiatp]

I think the primary problem with domain fronting that ECH would solve is that ECH doesn't involve using a third party's domain name, potentially dragging a single third party into the censorship muck. My read of the support email signal shared is that AWS was unhappy that a domain they owned would likely become entangled. While ECH will still increase everyone else's risk that is sharing the same load balancer as a censorship target, it is at least a fully distributed risk, rather than requiring the client pick a specific domain or set of domains to pull into their fight.