It’s quite a bit different… Facebook took themselves offline completely because of a bad BGP update, whereas AWS had network congestion due to a scaling event. DNS relies on the network, so of course it’ll be impacting if networking is also impacted.
no. it wasn't a "bad bgp update". bgp withdrawal of anycast addresses was a desired outcome of a region (serving location) getting disconnected from the backbone. if you'd like to trivialize it, you can say it was configuration change to the software defined backbone.
