Star Trek Discovery: Every Easter Egg & Hidden Reference From 'People Of Earth'

During the standoff with Wen's ships, Book mentions that they're armed with quantum torpedoes.

Quantum torpedoes were first seen Star Trek: Deep Space Nine's "Defiant" in which they were Starfleet's brand new weapon. They would go on to be prominently featured in Star Trek: First Contact as the Enterprise-E's primary defense against the Borg and would be used alongside Trek's traditional photon torpedoes.

While it's a nice nod to the latter-Next Generation era, it is kind of odd these weapons would still be in use over 800 years later, though it's possible Wen's down-and-out people are just using some pretty old weapons.