It's called the Network Effect. Most people, like you, want to be on the platform that everyone else is using. Others want to be on the "best" platform (whatever that means for them) and when they find one they like, they'll start advertising it to others. Eventually, enough people will move to a new platform that it starts making sense for people like you to move there as well.

Remember how everyone used to be on ICQ, then MSN Messenger, etc? It used to happen a lot with messaging and social media platforms until Facebook and Twitter got big enough to start buying and shutting down the competition. It's happening now with people leaving Reddit for Fediverse platforms like Kbin and Lemmy.

There is nothing wrong with waiting for the Network Effect to push you to a new platform, if it ever does. The point of social media is being social - if you're there to interact with friends, you obviously want to be where your friends are.