Switching between NVIDIA and Intel denoiser would be ok since they need the same Render elements. Nevertheless, V-Ray denoiser requires different Render elements. It's also possible, but it means that you will end up with more render elements in your file. So there is a trade-off. If that is ok with everyone who votes, then we could make it. Generally speaking, people would like fewer Render elements in their files.
Switching between NVIDIA and Intel denoiser would be ok since they need the same Render elements. Nevertheless, V-Ray denoiser requires different Render elements. It's also possible, but it means that you will end up with more render elements in your file. So there is a trade-off. If that is ok with everyone who votes, then we could make it. Generally speaking, people would like fewer Render elements in their files.