Why do people use one social media site over another? He will only do it when he finds it useful.

It’s not a religion. It’s just a tool. Just send him something interesting on this platform. If he thinks there is anything interesting here, he will start using it on his own.

You have 128GB of RAM

Who do you think I am, a multimilionaire?

Stack Exchange. I know, controversial, as people complain about rules being there too strict and community not being too welcoming nowadays, but still a real goldmine of knowledge. All of that with no ads, no spam, no dark patterns.

Even if you go to Europe (where I live), you will still listen to American music, read news about America everywhere, eat American crap food, use American Internet services, watch American TV shows. It is not easy to leave America :D