Vettel makes decision: what does this say about possible future at Mercedes?

Since the announcement that Lewis Hamilton will switch to Ferrari in 2025, speculation about his possible replacement at Mercedes has been rife. Sebastian Vettel's name has also come up several times, despite the fact that he hung up his helmet after the 2022 Formula 1 season. Now, moreover, he is taking a step back in his activities for the Grand Prix Drivers' Association (GPDA).