It might be. Notice that it's only been in use for about 3 years. The difference is you don't tend to upset users due to underlying infrastructure changes.

Zanzibar has been in use for way more than 3 years. I used to work in the SRE team supporting it 7 years ago, and it already had significant users back then.

Rule of thumb when reading Google papers: if you start now and copy it perfectly, you'll still be at least ten years behind. With few exceptions they don't publish "industry-enabling" papers.

I hope not, I just finished integrating with it at work.