>I listen to the Conan short stories, while I work out and in one of them he visits a tower of an evil Sorcerer, who is holding a huge elephant-man hostage, who explains to Conan that he is from outer space and flew to his world with wings, which his race last and lived on his planet for far longer than the current iteration of civilization even existed.
>In the Might & Magic games you have an intergalactic network of planets being joined together and having access to very advanced tech and magic, but it degenerated into a standard fantasy world after the Ancients had to cut the network.
>In Sword & Sorcery you often had authors try to make their world scientifically consistent and give hints that magic might just be science and that some ruins might be built by aliens, not Gods.
The desire to have a pure magical fantasy world, unsullied by science and technology, is a degeneration of the fantasy genre.