The article says it was first deployed in 2011. Five years is a pretty good run. I wonder what they're deploying right now?
If I wanted to own a machine and not be detected, that's where I'd live. It's also complex and closed source so you are basically guaranteed to have exploitable bugs that won't be fixed. It has access to network and system busses at a layer below the OS so ex-filtrating can be done at a layer below what the OS can see.
For a project this big & complex, and for something that cost hundreds of millions of dollars to develop, 5 years is paltry. Duqu remained hidden for 11+ years.