Inspired by this comment saying that decentralization of block production is overused in the way people market Cardano online, I was curious to see if any other platforms have achieved this. I know that other platforms such as Tezos do have some level of on-chain governance, but not necessarily 100% decentralized block production as Cardano does.

• When I search "decentralized block production" in quotes, I get over 1000 results, which seem to all be about Cardano.
• When I search the same thing but only allowing results before 2021, I get only 6 results and they all (literally 100% of them) seem to contain the word Cardano or ADA or IOHK.

Is it really the case that no other platform has managed to achieve 100% decentralized block production?