Meta already did that, right under Apple's nose for three years!

https://techcrunch.com/2019/01/29/facebook-project-atlas/

They wouldn’t even need to do that. It’s pretty easy to come up with any number of pernicious approaches they’d use:

- “instagram is better with MetaAi: yes/ask-me-later”.

- updated ToS which bundles a “we’ll use our own ai, and do whatever we waaaaant”

Lying, gaslighting and underhanded “growth hacking” tricks are their bread-and-butter, and you can be sure that whatever they’d have you install would blindly slurp up as much as they possibly can with zero regard for user privacy.