a combination.

YT for quick grasp of knowledge ie investigative, commentary channels or tutorials

Reddit, Quora, Hacker news,Twitter for specific explanations

Chat GPT is like a process, it's something everyone can use and get to a functional level. But too decent, too boring.

Podcast - I find myself enjoying this of late - mostly huberman or fashion related

Research articles - with research, you will find those in support or against, depends on what you want to read.

Books are a game changer. It enhances thought processes, emotions, and conversations the more you read.

and lastly while this is not app/site - great people to exchange conversations with, the thought expanding and satisfying kind.