nptr

That may help identify the local IPs but not the remote IPs.

The blog post mentioned that "The eBPF flow logs provide a comprehensive view of service topology and network health across Netflix’s extensive microservices fleet, regardless of the programming language, RPC mechanism, or application-layer protocol used by individual workloads."

Service mesh may have restrictions on the network protocols and may not cover all network traffic (like connections to Kafka and databases).

This is spot on. The AWS logs can also be orders of magnitude more expensive.