Bedrockgames
I post in the voice of Christopher Walken
The beauty of Ravenloft is that every domain COULD be its own genre of horror. I personally enjoy the gothic, but I can't fault them from wanting ghost stories, folklore, or other elements of horror. You don't like the zombie apocalypse domain? Don't use it. If there is ANY benefit to the "every domain an island" setup, its that the domains you use and ones I use can be different and we don't have to worry about the ones we don't like.
That is a fair point. The structure of Ravenloft definitely allows for that. I still feel it is more cohesive when they are at least connected. You can have gothic and classic zombies. I never found that terribly disjointed. There was a hammer movie called plague of the zombies, which I think they were drawing heavily from when they did Souragne for example. And here and there, some 'spikes' in genre were cool (I always thought Bluetspur was kind of neat and different). But overall the demiplane had a gothic and classic cohesiveness to it (even if individual domains were cobbled together from different sources of inspiration from within that, and even if the odd domain stretched into other genres). Again, if you go full generic horror, to me that just isn't Ravenloft anymore. Maybe it is really good. Maybe it is a great concept. But it kind of becomes the TORG setting (except with a focus on horror genres). And I love TORG, but Ravenloft was never that meta in terms of the genres.