They are, but the successful part of the Semantic Web is almost entirely limited to open-source datasets (grouped under the "Linked Data", or "Linked Open Data" initiative). That's pretty much the only part of the web that actually has an incentive to release their info in machine-readable format - everyone else would rather control the UX end-to-end and keep users dependent on their proprietary websites or apps.

But without learning, or resolving, or trying to resolve the issues that killed the 5th Generation and GOFAI in the first place.

"let's use Description Logic and F-logic because we both cannot do the science or maths to decide between them as a community (oh the irony) and hope that because they are tractable the fact that they are not expressive isn't going to matter"

5 years and £250m tax money later...

"It turns out that it matters, and there isn't an alternative, and we don't know what to do"

Meanwhile on another planet, AI researchers :

"Answersets and FOL offer a potential solution, we just have to slog away on a shoestring for 15 years to get there."

There is some interesting work using graph embeddings (like word embeddings)to add data and relations to semantic web style knowledge graphs.

Yes, this. Alternatively, what's the logical next step once the semantic web is realized? Ask yourself where wikidata is going in the long run.