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> Google hasn't used TCP in the datacenter for years.

That's absolutely false. I don't have any sources except for having worked at Google from 2013-2022, but it's not like you quoted any sources either, so...

There's a reason why Google is still releasing stuff like TCP BBR (2017).

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Well, the first link googling 'google datacenter hardware' is google's article on how they don't use standard TCP hardware or software in their datacenters. But I guess that was too much to ask...

There's a big difference between "hasn't used TCP in the datacenter for years" and "don't use standard TCP hardware or software in their datacenters". Google uses TCP with non-standard configuration, but they still use TCP.

I can't seem to find the same search result with this query. In fact, searching for "google" "standard TCP" doesn't seem to find any such article (only Google's 2011 publication on TCP Fast-Open deployment, ironically), so it's going to be hard to find what you're talking about.

If you link to the article in question (and relevant quotes) I'm happy to try and clarify your misunderstanding.

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