How many CPUs does Google have at its disposal these days? And how many queries are performed per second?
My experience with working at a FAANG: I remember a service that was easily dealing with >10M QPS (albeit much simpler queries than a Google search), or some other services continuously processing (reading/writing to disks) > 100 GB/s.
There's A LOT you don't see in FAANG frontends. In particular, the Twitter thread owner suggesting https://developers.google.com/speed/ has no idea where is the slowness coming from.
That being said I'd love to be a Google employee to investigate those queries. Perfect bug reports.
And yes this is an oversimplified model. No idea how much CPU is actually used.