If you wanted to keep up with what's happening around you, either in general or in a specific topic, it was the place to be.
It was possible to hear directly from the people who are reporting on the news you care about, but also from the people the news were about. And INTERACT with them directly.
Unfortunately that didn't last for long.
What the openai debacle showed us very clearly is how important the platform still is despite all the damage. Threads was as if it didn't even exist.
The thing is, none of the fediverse networks who try to replace Twitter would be able to accomplish that same mission.