I’d say that he replaced himself with a Zuckerbot but stapled his face on it to try and seem less like an alien than Zuck but the creep is so obviously on industrial quantities of amphetamines these days. Every interview he’s given that I’ve had the misfortune of witnessing he’s gnashing his teeth and jittering constantly. Dude probably hasn’t blinked in 5 years.

The obvious answer is that on-screen makeup was skipped.

Maybe he’s worried that a lowly pleb might assassinate him via a contact poison. I hope so.