title_body: Is Cardano the only platform with 100% decentralized block production?
upvoted_answer: This all depends on how you view it. For instance, consider Bitcoin. Bitcoin has 100% decentralized block production, since no central authority owns Bitcoin and can regulate its block production. One might argue that the large mining companies that control a majority of block production makes this decentralization somewhat dubious. To be fair, the same thing happens with Cardano. Consider how much of the Cardano block production the Binance stake pools control.
  To be honest, I am not sure there is a straightforward answer to your question. I would say that other chains have achieved full decentralization; however, Cardano is one of the most decentralized (if not the most) due to the numerous stake pools operated by individual community members.