Google does not work like every other data center in the world. All internal services communicate over SSL (or similarly encrypted links)

Though only because they discovered their internal unencrypted links were being systematically compromised on a truly massive scale for years.

False. There was already internal encrypted traffic and the revelations only sped up the migration for the rest.

https://www.washingtonpost.com/business/technology/google-en...

I think the load-balancers do not communicate over SSL. At least not the ones in front of Appengine applications. Perhaps only inter-services communication is encrypted(i.e. app service with database service).

Most datancenters are lost once the internal network is hacked so I think that's a different issue. Encryption wouldn't help either because the attacker could get the keys too.

Encrypted links between processes inside a data center is still a good thing: It protects against malicious actors sniffing traffic (without compromising the machines in the data center)

So again... how is this better than end to end SSL?