i wonder how many hundreds of thousands of dollars network flow logs cost them; obviously at some point it is going to be cheaper to re-implement monitoring in-house.
Doing it with eBPF on end hosts you can get the same data, but you can attribute it directly as you know which container it originates from, snoop dns, then you can get extremely useful metrics like per tcp connection ack delay and retransmissions, etc.
AWS recently released Cloudwatch Network Monitoring that also uses an agent with eBPF, but its almost like a children's toy compared to something like Datadog NPM. I was working on a solution similar to Netflix's when NPM was released, was no point after that.