That's exactly what they've done. Bluesky is a decentralised service. It was designed to be decentralised. It's currently centralised in a limited capacity beca

That's exactly what they've done. Bluesky is a decentralised service. It was designed to be decentralised. It's currently centralised in a limited capacity because they didn't open up federation right away. First they allowed DID federation (i.e. you can host your own DID by tying it to your domain name). Then feed curation. Then data storage. Then moderation features. And so on. There's really only a few things left and those are systems that are designed in a decentralised manner but for the sake of a smooth transition have yet to be handed over fully to the community.