In addition to the ways in which it permanently altered genre tropes, I have this theory that the other big reason that people remember "The Night Gwen Stacy Died" is because a lot of the REST of Conway's Spider-Man run was ... well, not very good. With a lot of his stuff, there seem to be these flashes of genuinely good inspiration, mixed in with a whole lot of stuff that ranges from mediocre to WHAT THE FUCK. I mean, really, what does it take, to manage to create what's come to be almost universally regarded as the WORST Justice League ever? That's like, I don't know, creating Voyager or Enterprise.