Is Google Wave still available?

Excuse me, could you please clarify something for me? I've been hearing a lot about Google Wave in the past, but I'm not sure if it's still up and running today. From what I understand, it was supposed to revolutionize the way we communicate and collaborate online, but I haven't heard much about it lately. So, I'm just wondering, is Google Wave still available for users to access and utilize, or has it been discontinued and replaced by other platforms? Thanks in advance for your help!