Is Solana really Decentralised?

I've been hearing a lot about Solana lately, and one of the main selling points is its decentralization. But with so many blockchain projects claiming to be decentralized, I'm starting to wonder if Solana truly fits the bill. Can you explain to me in more detail how Solana's architecture and governance structure support its decentralization claims? And are there any potential concerns or limitations that I should be aware of when it comes to Solana's decentralization?