How will personalized AI be possible in the current system?

Hi, how do you guys think personalized AI will be made possible, given that companies are currently independently collecting user data without a central point for it? A good personalized AI would know a lot about the user's interests, preferences, etc. For example, if someone engages with Star Wars-content on Reddit and they like to use Midjourney on Discord, then a personalized AI might suggest the user to create Star Wars style images.

What do you guys think? Any articles, podcasts, etc. on this?