I interviewed at Google a while back for an SRE position working with the Hangouts team. My first interview was in another office and the audio in Hangouts session would not start. We ending up having to move on to the next interview. I'm not surprised even Google employees don't use it.
> I'm not surprised even Google employees don't use it. I wouldn't go that far - there's something like 250k hangout meetings per day at Google[0] and that was before Covid. [0] https://www.blog.google/products/g-suite/how-google-went-all... (2017)
"Nearly a decade has passed since we built the first prototype. Face-to-face collaboration is ingrained in Google’s DNA now—more than 16,500 meetings rooms are VC-equipped at Google and our employees join Hangouts 240,000 times per day!"