They were referring to a completely different incident, involving compromised authentication to a camera system. I’d love to hear an explanation of how a zero-trust model would apply to this situation with Fastly. Seems like it would have to apply to a lot of multi-tenant resource exhaustion issues since we know so little about the specifics on the Fastly incident.
A blog post concerning how customer configurations cannot bring down other customers' sites would be great to see from Cloudflare. Fastly does not seem in a position to say that about its own stack and I don't expect another company to know their stack that well.