It’s quite ironic that the author chose to publish a post on that subject on medium. ;)
Definitely, I don’t understand why so many technical people still use it when there are great open source and federated alternatives like Plume.
I think the post also discusses some interesting concerns around distributed computation such as network partitioning, database architecture, and so on. Whether blockchain is a good fit for this problem is certainly debatable, but I think the post is completely on point regarding the problems with centralization, and has a good discussion of problems that need to be addressed for decentralized solutions to become competitive. Personally, I think that ActivityPub along with open data formats addresses a lot of the same problems. Whether there is added value in making computation itself distributed is not at all clear to me.
I, for one, am excited to learn about Plume. I haven’t used it because I didn’t know about it. So, thank you. :)