Neeva tried to do something like this. While it wasn’t everything you mention here, there was a feature to login to various online accounts so it would search a

Neeva tried to do something like this. While it wasn’t everything you mention here, there was a feature to login to various online accounts so it would search across the web, but also your data and documents in those various accounts. I never connected my other accounts, as I found the idea of a 3rd party having access to crawl and catalog them uncomfortable. Neeva has since shutdown and was acquired by Snowflake. What you’re mentioning, would likely require a company to have a very large monopoly for a very long time, where all a person’s digital media was controlled by one company. Google is close, but for book people paid for, that’s something that would fall more into Amazon’s territory. Apple also has a bookstore, so maybe it would work for people who are 100% in Apple’s ecosystem and never stray, and then only have friends with people also in Apple’s ecosystem (for the people you trust feature). I don’t think we’ll every see enough benevolent cooperation between companies, without ulterior motives, to do something like this well without it also being a security nightmare.