Blow up eleventy trillion aliens from the Rth dimension, less impact on the reader (and the future of the storyline).
You're right, but it has been done without a reset and with some impact, (although not in Star Trek
). I direct you to Doctor Who
Only if you call Sarah Sutton attempting to act "sad" for about fifteen second impact. Because beyond that, the destruction of one-third of the universe in 1981 had pretty much no repercussions.