Not for any particular reason, but for a variety of reasons that work together to make it even better. I have listed just a few of them. Feel free to add to the list as you see fit.

• No king of the hill.
• No hidden corporate interests.
• No karma system.
• Rejection of toxicity. The flow of conversation is civil and has a good vibe.
• The Federation functions as an engine of accountability.
• A bunch of people who actively contribute to making this a good place.
• A vocal community that actually determines what content is important.
• The initial difficulty to make sense of it all (call it a "barrier to entry" if you will) acts as a natural deterrent to those who are less engaged.
• Lurkers who sign up quickly feel comfortable posting.
• The ability to sign up for a particular instance and leave if for some reason you find it's going in a direction you do not agree with. Lemmy's decentralized nature saves the day.
• The influx of refugees includes experienced people with a lot of knowledge to make this an even better place.
• The prospect of a quick release of reputable third-party apps. Since these developers bring solid knowledge from previous developments, their new Lemmy apps will immediately translate into a smoother user experience.

I am looking forward to great days ahead.