Nah …it’s testable and repeatable. DX12 ready cards aren’t the same as D12 optimized cards. Memory bus speed and threading architecture have a lot to do with this at the actual driver and lower hardware level. If DX12 actually ran at DX11 speeds in SM5 we would be using it… why wouldn’t we?
What does a biased belief benefit anyone who deals with stats and numbers … or let me say what benefit would an engineer gain to fabricate something and go through the effort of making a case to continue support if benchmarking showed otherwise? We can’t afford to live in some realm of “I feel this way”. Its a waste of both my time and the epic teams time. That’s why I provided such a detailed outline showing the actual “packaged” numbers and both stat unit outputs to show exactly where the cost is.
If vulkan or DX12 could provide DX11 SM5 speeds & capabilities when running in SM5 shader model, then sure rip it out. We’d be running it already. (And as of the last fortnite update DX11 is still there rocking proudly for all the DX12 “ready” cards lacking the memory bandwidth or Ampere chipsets to see its benefits)
Reputable people in this field/industry don’t operation on “mindset”… We can’t afford to.