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They’ve already done it on the steev front end

I'm aware of steve utilizing ai, however im not so sure if its store on the blockchain itself

Why would you need to store the information on the blockchain?

Securty wise? Don't know to be honest.

I don’t think it’s needed the data is secured by the blockchain and only manipulated and displayed server side by the AI

Not within, not with Steem. I can't say if in the future it will happen, but right now it's not a possibility. Right now, the most effective way is to create AI as a parallel information digester that can create a smart and flexible recommendation and indexation system.

Theoretically speaking steem needs to fork in order to enable AI to be implemented or there few lines of code would be enough?