The rendering backend is a work in progress. In the near term, it'll let you use several levels of rendering abstraction, down to wgpu, which is what it currently uses, and eventually vulkan as well.
At the very least, you should move to a more modern rendering api like vulkan, wgpu (though I'm biased), metal, or dx12.
At the very least, you should move to a more modern rendering api like vulkan, wgpu (though I'm biased), metal, or dx12.