Sci-fi time travel stories with the tired "if you change the past you might make it worse" trope

 Sci-fi time travel stories where you change the past and everything is awesome, actually

@bgcarlisle that's probably part of why I love quantum leap so much. I mean, I'm a huge huge fan of time travel fiction in general, always have been, but I like the idea that not only are you changing the past for the better, but it's actually the objective of the thing.