Dang would be great if it was backwards compatible.You are not the first one having this thought.
But no, different electrical wiring harness, you will miss the wiring for the QS. The ECU will also be different, even if looks the same - The Diavel 1260 "non S" have the wiring ready , therefore possible to add.
But, if you go for the Xdiavel Nera, you will get the QS. So maybe from '23 it will be on the Xdiavel too(?)
Okay, I'll also thought so. (No quick shift)I just took delivery on my XDiavel Nera. It does NOT have QS. It's the one negative about the bike (so far). I've grown used to it on my Streetfighter V4 S.