I'm not saying it cannot implement Vulkan. Go back and read my responses, that has never been in any of them. You're injecting an argument I'm not even close to

I'm not saying it cannot implement Vulkan. Go back and read my responses, that has never been in any of them. You're injecting an argument I'm not even close to making. I am saying that your idea that Proton would necessarily be faster than D3DMetal is making assumptions that nobody outside Apple can realistically know. You don't know what their GPU supports natively and what would require software emulation. It might be faster, I'm not saying it wouldn't be. I'm just saying you cannot know without making a lot of logical leaps first. If by your own earlier comment, you allow for software emulation of certain features to get support parity, then you cannot make a realistic claim on the comparison of the performance of the translation layer since they're not 1:1 With regards to tile based rendering, many games do suffer when ported to tile based renderers. A lot of access patterns change, and things like post processing effects and full screen deferred buffers become more expensive. You cannot compare NVIDIA's tile based implementation to Apples. The similarity is in name only. Anyone who's ported desktop engines and games to mobile devices has experienced this. with regards to GTA:V, GPU usage alone doesn't tell you enough unless you specifically know where your bottlenecks are. Going by the gamer concept of "its gpu/cpu bound" doesn't really mean much for performance analysis beyond trying to guess what you should upgrade. GTA-Vs lowest resolution shaders (as in that video) would not be demanding for any modern GPU. The Rockstar engine scales very well by design. But unless you know where the CPU side is stalling, you don't know how you're starving the GPU or not. Anyway to reiterate, because you keep trying to insert a different argument: "You cannot know your claims are true because you don't have enough reasonable data to do so" <- That's it. You can hypothesize all you want, but it'll come down to that and that is ALL I am arguing.