Is there actually any evidence that this would improve performance significantly? Removing the translation layer means that every OS and their file systems have to do good wear leveling because otherwise you'll destroy blocks quickly.
That's pretty easy to do. Just use a log-structured filesystem[0]. The abstraction we use now is antiquated. It's very much reminiscent of the impedance mismatch in graphics APIs (such as OpenGL) which is now being solved (with Vulkan).
I think this is the idea behind FusionIO: doing the translation on the host CPU is faster, and allows you to expose additional commands (like atomic writes, or direct key-value interfaces).
It's hard to come up with evidence since there are very few options to create your own SSD/NVMe firmware for a real-world like device. The closest I've come up with is OpenSSD and that required $3000 and was for an old controller with very little documentation behind it.
