That’s a good take, I hadn’t thought of comparing it to Primer. In Primer, it’s clear Shane Carruth thought out all the implications of his time travel system. I don’t get that feeling from Tenet, where it feels like Nolan thought it would be cool and didn’t go further. What you end up with is a movie that’s fun while you’re watching it but falls apart once it’s over and you think about it for more then 5 minutes.
The scene I think is the most egregious is the air terminal fight. It’s a cool idea in theory but a fist fight between two individuals going in opposite directions in time would immediately result in a paradox. It’s hard to explain but it essentially boils down to the fact that both fighters are reacting to their opponents reaction to the move they’re about to make.
They do, it’s called Weibo and Elon has explicitly said he’s trying to make an app like it