For instance, here is the github thread on verifying event hashes which he refers to in that HN thread. From what I can see, he notes some of his (insightful!) thoughts on the matter, nothing but a civil discussion ensues, with parts of his suggestions getting implemented and others being worked on.
And to this day, despite people that keep on reporting about the issue, nothing is done to actually solve the problem.
If interoperability and federation is important, why push changes that break those, and do nothing for >6 months?
Yes, it would have been great to have done this sooner, but unfortunately fixing a bug which only impacts deactivating accounts when using custom identity servers took a while to get to the top of the todo list.