[ehllo]

Google replaced piper with mercurial

https://opensource.googleblog.com/2017/03/dispatches-from-la...

[jsolson]

Mercurial (with lots of extensions) sits on top of Piper at Google. It doesn't replace it.

[dmoy]

I thought it was Facebook that did the mercurial thing: https://code.facebook.com/posts/218678814984400/scaling-merc...

[IshKebab]

Actually that says they are working on improving Mercurial to the point where they can use it.

[ithkuil]

That article doesn't claim that. It only claims that mercurial is used within Google.