Exactly the same thing happened to the whole Semantic Web effort at W3C. It basically got overtaken by enterprise and now it is of little interest or use to regular web developers.
Yes, academics too. Also I am seeing lots of very loud enterprise software people around those standards. Yes, those are very small enterprise software companies.
This stuff is used within silos (Watson, bio/medicine research), but expanding it to the web is hard because entities that collect data want to monetise it, and do not see the value in reducing friction.
Exactly the same thing happened to the whole Semantic Web effort at W3C. It basically got overtaken by enterprise and now it is of little interest or use to regular web developers.