Snow Patrol released "Chasing Cars" in 2002. Twenty years later they've made a new song with Kylie Minogue that the band is carefully, insistently calling a non-duet.
The distinction matters to them enough to announce it. The distinction should matter to you because it reveals how aging rock acts now signal relevance. Not through the music itself but through the conceptual framework they place around it, and how that framework has become the primary product.
In 2007, Thom Yorke released "The Eraser," a solo album built partly on a specific refusal. He would not harmonize with guest vocalists, would not blend. Instead presenting separated vocal tracks as a formal statement about artistic maturity and refusing the easy consonance that pop music trades in.
It worked. Radiohead repositioned themselves as artists still willing to undergo genuine formal reinvention, and the "non-duet" became a marker of seriousness. But by 2015, The xx had made spatial separation of vocals sound like the default language of post-internet music. The deliberate emptiness between singers became not a provocation but a cliché. The theoretical apparatus that had surrounded Yorke's choice evaporated.
When legacy rock acts later released actual duets without announcing them as conceptual statements, nobody noticed. The framing had been marketing all along. Snow Patrol's announcement that they are not making a duet is an attempt to resurrect that framing at the exact moment it has become invisible. They are describing their artistic choice using a language that once signaled formal courage but now just signals that the artists understand they need to signal something. Watch whether the song gets discussed for what it sounds like, or only for what it was announced as.