It's also important to note from the article that it presents like chlamydia and is treated with the same antibiotic as chlamydia. Which is also used for tonsillitus, bronchitis, strep, and other bacterial infections. But is best treated with a 5 day treatment rather than one big dose. (This should be the same for chlamydia as single doses tend to lead to more resistance as it doesn't always wipe out infection, spread dose treatments tend to work best for bacteria). There are also alternatives as recommended, and plenty more to try.
Due to the nature of it's presentation, men tend to be symptomatic, the higher inflammation in women means that it's not necessarily telling until it gets quite bad. But for you guys, you'll spot the symptoms before you experience complications.
They're also over blowing it with the whole superbug thing. Yes, nature does abhor a vacuum, as such where some STDs become less common, other lesser known ones will crop up. This has been long noted in various diseases/infections. The real message is that researchers are getting another kick up the arse to stop just focusing on common known diseases/infections, and look at less common known ones. This is an STD that has been known since 1980ish, and I'm pretty certain rivals chlamydia for prevalence in the population.
There is also already a test for it, it's just not currently part of the standard clinical testing. But like many STDs, if you have symptoms, they'll often treat before sending off tests.
Additionally the line "most of the time responds to" is a common line for scare mongering. It will respond if you take the antibiotics as directed, rather than stopping before the prescription is done. But always get retested post treatment to be sure.