It is hugely disappointing for M2's not to be able to benefit from nested virtualisation. I would also be interested to understand the technical limitations here

Darn, I came here looking for a way to debug HLSL --> DXIL --> Metallib and I guess it's not really a thing yet :-/

I hoped to come here and find the answer to "Where did the Validate Workspace options go?" as it seems to have been swept under the rug.. My problem is not the same as the OP.. I'm using deprecated frameworks and I wanted to suppress those deprecation warnings via 'Validate Workspace -> Ignored Frameworks'.. Sadly, that's not an option anymore..