Has there been any mention in canonical or non-canonical Star Trek about any useful use of the knowledge given by the Cytherians to the federation in the episode The Nth Degree. This might have given them some scientific or technological edge in their wars against the Borg or dominion or any possible threats. Even though Picard notes that the knowledge they have been given "will take Federation scientists decades to fully analyze and appreciate", has there been any gained in the short term that helped the federation in any way?
Other than the Nth degree the Cytherians are never mentioned again in the Star Trek canon. There are references to their tech level in the DS9 technical manual, but beyond that there is nothing.
Picard notes that it will take Federation scientists decades to fully analyze and appreciate their technology. If their technology was integrated into the Federation we have not seen it mentioned onscreen or in any of the official fiction.