It is "root" in the sense of "root certificate"[0] which allows, potentially, the ability to MITM essentially any TLS connection transparently to the user.
"root access" has a different meaning than "root certificate"
Yes, I'm aware of that, which is why I "translated" for the article.
Any non-pinned connection, since some apps employ certificate pinning on iOS and can't be intercepted without modifying their application binary. This is uncommon, though.
A notable app that uses certificate pinning is Facebook.
Phew, I was worried that facebook would scrape my confidential communication with facebook.
We all know what "root access" means, and this is not it.