From the previously-posted thread on this that got no other replies: an astute article. One thing not addressed here is the failure of the Smantic Web paradigm to really take off; I don't know whether this is because of a lack of critical mass in the quantity of semantically coded data or the immaturity of ontology frameworks or something else - my best guess being that the browser is no more suitable to traversal of…
Another thing is that huge ontological databases actually exist, it's just that no one seems to be able to use them for anything useful. Knowledge bases and formal reasoning over them used to be a big deal in AI.
This comes from someone who tried to do a startup that essentially tried to incentivize creating semantic data. It's a hard earned lesson, but I now have zero belief that manual formalization of data is ever going to take off. Even if lots of cool things would be possible if it did.