Ability to understand all machine learning models to modify code and those models directly and create better ones every time.

I would take existing ml model, modify it by hand to create better one, win some multimillion dollars competitions and make them open source.

Eventually all recommendation systems, text to speech, speech to text, music generation, movies generation etc would be opensource.

This would either destroy or boost all modern economy but for sure it would make harm to corporations and make them cry.

That would be fun to see.