For those not familiar with the subject: PCREs are not regular expressions in the computer science meaning. The article implicitly states that the PCREs are regular expressions.

So, the article's message boils down to "if you make your language more powerful, you can do more with it. The PRCE language is so powerful that you can do the following with it: ..."

After all it should be no big deal binding the PCREs from your favorite language...