I think it is relevant to point out that Intel’s compiler team would almost certainly never have chosen LLVM in the first place, if it forced them to release wh

I think it is relevant to point out that Intel’s compiler team would almost certainly never have chosen LLVM in the first place, if it forced them to release whatever secret sauce is giving them the performance increases we see in those performance plots. So it’s not so much a “look at how much LLVM is missing out on by not using copyleft”, it’s more of a “LLVM has gotten some benefit from Intel adopting their tech and putting some of their work back into the open source project”. Sure, I’d love for Intel to upstream every optimization they make, but I don’t see that as necessary or even good business sense for either Intel or LLVM.