Is Vulkan the recomended backend?

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If your GPU supports it, Vulkan is now recommended. It's not perfect, but it's pretty close and better in many cases than OpenGL.

For example, in Tales of Phantasia X - on a powerful desktop with a decent video card - OpenGL slows down when entering battles. Vulkan runs fine.

Texture scaling currently performs a little worse in Vulkan than OpenGL on desktops.

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