[davidz]

Speculating here, but I would read this as "anycast" as a concept, where each user is connected to the closest location. versus anycast as in the IP protocol. The complexity far outweighs benefits with routing each UDP packet to different servers within the same session.

[yencabulator]

Cloudflare uses Anycast for the TCP connections they terminate. See e.g. https://blog.cloudflare.com/magic-transit-network-functions/ or ponder DNS-over-HTTPS to 1.1.1.1

I don't think they've talked much about what happens if the connections gets routed to a different PoP mid-stream.