Webkit (and subsequently Blink/Chromium) and LLVM especially did have a significant impact though. > didn't build their platform "almost from scratch". Well,

Webkit (and subsequently Blink/Chromium) and LLVM especially did have a significant impact though. > didn't build their platform "almost from scratch". Well, no, it’s of course relative I meant that compared to Valve/Steam they did. And it’s not like iOS/macOS is just a collection of open source components slapped together with some small proprietary layer on top. At this point it’s mostly proprietary stuff they had to build effectively from scratch over the years with some open source components here and there.