There are so many great stories and/or starts to stories out there that I'd love to see more of. One of the oldest and most prominent examples I can think of is Lisa's Chronicle (iirc). It was on lw forever ago so idek if the original can be found still. It was great and ticked a bunch of my kink boxes, but it ended with a sort of cliffhanger and it seemed like there was so much more coming that never did. That's just one example off the top of my head... I read a lot of smut lol