The article states that "Tandem Attacks have returned for the characters who have the Stand style, still consuming some of the Heart Heat Gauge"
However, this does not appear to be true. I've played the (unupdated) version of the game, and watched videos on it and have not encountered this mechanic.
I'd like to know what the article is referring to. Perhaps Stand Rush has been mistaken for tandem, or it was added in a new update.