Did you see the NBC interview with Lewis after the race? I've never seen anybody looking so cheerful right after a mechanical retirement when he was positioned with a decent shot at the podium.

I have a theory: Lewis is cheerful because he's just realized that Vettel is now only trailing Nico by 8 points in the WDC. On the current development trajectory of Ferrari relative to Mercedes, even with the new Merc engine there's a pretty decent chance that Nico will get overhauled. Lewis' commitment to the team notwithstanding, that would make him very happy; every time a driver wins the WDC with a car seen as dominant, the charge will be thrown at them that they didn't "really" win on their own merit and "anybody would have won with that car". It's been thrown at Lewis before, Vettel many times in the RB days and at Jenson. If Nico doesn't take second place, though, that argument kind of comes off the table...