Off the top of my head: Dynamic rendering, timeline semaphores, buffer device address, shader subgroups, push descriptors, descriptor indexing. These are mostl

Off the top of my head: Dynamic rendering, timeline semaphores, buffer device address, shader subgroups, push descriptors, descriptor indexing. These are mostly "software" features and they are all required in Vk1.3, and a huge improvement over what there was before it. Mesh shaders and ray tracing need hw support, but there's a lot of improvement in the API you get without latest hw.