How important is the idea of "canon"-a theological term about what is or isn't holy writ-to science fiction and fantasy? Especially in a world where fanworks and fan interpretations are more and more prevalent and easier and easier to access, is the very concept of a strict 'canon' not as useful? Was it ever useful to begin with? I'm not talking about internal consistency inside a specific work. Rather, the question I'm asking is how important do you think the idea of a single, unified setting that holds your entire corpus of works in that setting together to science fiction or fantasy series is?
I've seen a bunch of works of fiction which don't really have a 'canon,' whether they excuse it by saying that different works are set in different alternate universes, treating each work as a 'reboot' of the same, or just not explaining the contradictions that show up between different discrete works, even though they're ostensibly set in the same setting. Alternatively, there are works where the only thing that holds them together into a coherent unified setting is 'canon,' because each discrete fictional work is so separated in time, space, and (to a great degree) plot from the others that you could split them from each other and enjoy each on its own, with no knowledge of the greater universe, just fine. On the other hand, there are definitely franchises which make use of 'canon' relatively well, like the MCU which owes a lot of its sense of scale and scope to the actual existence of a 'canon.' But even then, the only need for the 'canon' itself is simply broad-strokes "something like this happened in the setting." So even something like that seems to me like it would work even if you didn't have strict care about some sort of unified canon, and you felt free to have things that couldn't quite be pieced together.
I've seen a bunch of works of fiction which don't really have a 'canon,' whether they excuse it by saying that different works are set in different alternate universes, treating each work as a 'reboot' of the same, or just not explaining the contradictions that show up between different discrete works, even though they're ostensibly set in the same setting. Alternatively, there are works where the only thing that holds them together into a coherent unified setting is 'canon,' because each discrete fictional work is so separated in time, space, and (to a great degree) plot from the others that you could split them from each other and enjoy each on its own, with no knowledge of the greater universe, just fine. On the other hand, there are definitely franchises which make use of 'canon' relatively well, like the MCU which owes a lot of its sense of scale and scope to the actual existence of a 'canon.' But even then, the only need for the 'canon' itself is simply broad-strokes "something like this happened in the setting." So even something like that seems to me like it would work even if you didn't have strict care about some sort of unified canon, and you felt free to have things that couldn't quite be pieced together.