Is Starknet mainnet live?

Could you please enlighten me on the current status of Starknet's mainnet? I'm quite interested in the development of this platform and its potential within the cryptocurrency and finance sector. Has Starknet's mainnet officially launched and become operational? If so, what are the key features and benefits it offers to its users? I'm also curious about any challenges or limitations it might face in its early stages. Your insights would be greatly appreciated.