As X moves to shut down Circles, its more enclosed sharing option, it’s also looking to add more functionality to Communities, as a means to facilitate topic-specific engagement, in isolation from a users’ regular X identity.
Which makes sense. For years, the former Twitter team had been trying to work out how to encourage people to contribute more to different discussions, with many feeling somewhat limited in their engagement due to how they’d built their presence. For example, if you use X as a professional tool, you’ve likely built a niche audience based on a specific topic, which can make it feel like you can’t contribute to, say, a sports discussion, as you don’t want to alienate your followers.