Cliffhangers on incomplete fanfics or 1-season animes (or even movies, looking at you ALITA) are SO. SCARY., because you never know if the author is just gonna forget it at some point or if the anime is gonna be dropped, lose funding, what have you.. It's why I try so hard to only read complete stories, because the pain is unbearable. Harder to do with anime because interesting shows are interesting shows, lol.
And I generally love when people reboot their own stories (when they never completed the original, at least), though sometimes they've made me sad because the reboot just dropped all the plot-points I liked and everything else was just "meh".

Like, the writing is better, but suddenly I'm not as invested, lol.