Vanilla is a product of Lussumo:
Documentation and Support.
1750 is not only the year in which fantastika began to be written as a weapon against the owners; it also marks the point when Western Civilization begins to understand that we do not inhabit a world but a planet. It is from this point that science — astronomy, physics, geology, biology — begins to shape our understanding that we are a species on a rolling ball, that the past is deeper than we can conceive and that the future is going to rip us apart. (Science fiction does not begin in the discovery of Space, but in the discovery of Time: terroristic meditations on the conjoining of Ruins and Futurity dominate the first decades of the genre.) So science takes the ground from underneath our feet; and fantastika, with its heated and cartoon immediacy of response to instability and threat, responds instantly to the vertigo of this new knowledge. Fantastika vibrates to the planet. It is the planetary form of story.
At base level - the very first intuitive impressions of the words Fantasy/Horror/Science Fiction conjure, to me at least, the contexts of the timelines you've attributed there.
But we've now got a clearer idea of what there will look like
That we've, to some degree at least, got there?