Respectfully, I’d like to call bs on that one.

The article you linked ins from 2017.

I interviewed for an are position in 2019, and I still had to go through 7 interviews: hr screening with dumb trivia questions, phone screen with coding questions and then five (!!!) more interviews in a single day on-site.

(For the record, I didn’t pass something on the in-site interviews, in my opinion nothing I couldn’t have learned)

I worked at Google from 2004 - 2007, and I remember hearing this towards the end of the time I was there in a presentation shared by the people ops team.

It's possible that this wasn't really followed in the hiring process - doesn't mean that the conclusion isn't true. I guess it seems counterintuitive on some level that more interviews wouldn't yield more signal.

I interviewed at Google around 2012 and I definitely went through more than four interviews. It was seven or eight in total, if memory serves.