The Federation and Starfleet are more changes in terminology. In universe, genetic engineering being fine and the Federation performing it in "Unnatural Selection" versus the retcon that it's been illegal since 1996 raises far more issues.
As do the warp speed scale changes. TOS crossed the galaxy on a whim, Voyager made it a lifelong journey and now we can't really reconcile time and distance in Trek.
Time travel. Every episode has different rules, it's a complete mess and makes zero sense.
As do the warp speed scale changes. TOS crossed the galaxy on a whim, Voyager made it a lifelong journey and now we can't really reconcile time and distance in Trek.
Time travel. Every episode has different rules, it's a complete mess and makes zero sense.