We've reached the point where it could be a combo SD Express/CF Express reader, running on USB 4.0 and packing Bluetooth, which is something that a lot of enthusiasts and pros would want for field usage. Despite the lack of SDE-equipped cameras and general hardware over the past several years, the controllers have now been available long enough for products (cameras, camcorders, and readers) to be developed and SDE can easily slide in and replace UHS SDXC cards in the ecosystem, while maintaining full backwards compatibility.