This is for the whiners, you know who you are:
Perhaps you think that the "headers" to which I have been referring compose a large part of the exhaust system.
Perhaps you think it would cause less confusion to call it a titanium/steel/carbon/aluminum/fiberglass system, or that
any street-legal exhaust in the world is made 100% out of titanium.
Perhaps you think it's a good idea for a manufacturer to accept a solution that they know will compromise long-term reliability.
Perhaps you think that you are a good enough rider to feel a few grams of weight difference on a 205 hp motorcycle.
Perhaps you think that Ducati didn't have good reasons to use SS headers, or that it wouldn't have used titanium headers if they had been an acceptable solution.
Perhaps you think that there aren't enough appealing features and details on the bike, and that changing the header material is the missing key to increasing its desirability.
Perhaps you think that after giving the Panigale R a near-Superbike engine with titanium mufflers and exhaust tubes, race-focused geometry, and world-leading electronics, the engineers picked the few inches of tubing next to the heads as the ideal part to save costs on.
You'd be wrong.