Comment by pjmlp
Long term shading languages will be a transition phase, and most GPUs will turn into general purpose compute devices, where we can write code like in the old days of software rendering, except it will be hardware accelerated anyway.
We already see this with rendering engines that are using CUDA instead, or as shown at Vulkanised sessions.
I do agree that to the extent C++ has grown, and the security issues, something else would be preferable, maybe NVidia has some luck with their Slang adoption proposal.