Answer (1 of 14): The term “continuity error” gets thrown around a lot in reference to Trek, oftentimes erroneously.
Some of the most famous “continuity errors” can be explained with a little imagination and common sense.
WHY DOES KHAN KNOW CHEKHOV IF CHEKHOV WASN’T INTRODUCED TO STAR TREK UNTI...
It’s technically not canon anyway, and I don’t really like it as an explanation, since we don’t see variable-geometry nacelles on other ships of the era.
Best to assume they solved the subspace damage problem through some other means, IMO.
I like to think a party got elected that felt warp speed tearing up subspace was a fakenewz hoax.