And CUDA has zero non CUDA tooling. That's a pointless circular argument which doesn't mean anything. Rust has Rust tooling and it's very good.

Being language agnostic is also not the task of the language, but task of IR. There is already a bunch of languages, such as Slang. The point is to use Rust itself for it.

Where is the graphical debugging experience for Rust, given that it so great tooling?

Slang belongs to NVidia, and was nicely given to Khronos, because almost everyone started relying on HLSL, given that Khronos decided not to spend any additional resources on GLSL.

Just like with Mantle and Vulkan, Khronos seems that without external help they aren't able to produce anything meaningful since Long Peak days.