What's more interesting is their talk on networking in Destiny 2 and how that's changed since the first game.
So why no dedicated servers?
Matt Segur, Engineering Lead on Destiny 2: Every activity in Destiny 2 is hosted by one of our servers. That means you will never again suffer a host migration during your Raid attempt or Trials match.
This differs from Destiny 1, where these hosting duties were performed by player consoles and only script and mission logic ran in the data center. To understand the foundation on which we’re building, check out
this Destiny 1 presentation from GDC. Using the terms from this talk,
in Destiny 2, both the Mission Host and Physics Host will run in our data centers.
Why peer-to-peer? Are we trying to save money?
Matt: Nope! We've invested heavily in new server infrastructure for Destiny 2, including using cloud servers for gameplay for the first time. We really believe this is the best model for all of Destiny 2's varied cooperative and competitive experiences. Engineering will always involve tradeoffs and cost-benefit analysis, but as a team we’ve got no regrets about the unique technology we’ve built for Destiny 2.
Wait, so we do have dedicated servers?
Matt: We don't use that term, because in the gaming community, “dedicated servers” refers to pure client-server networking models. Destiny 2 uses a hybrid of client-server and peer-to-peer technology, just like Destiny 1. The server is authoritative over how the game progresses, and each player is authoritative over their own movement and abilities. This allows us to give players the feeling of immediacy in all their moving and shooting – no matter where they live and no matter whom they choose to play with.
More at the link.