AppleWin only supports the WebKit1 API (the old, single process WebKit), and not anything more modern.
As for why Sony maintains WinCairo, I believe they use Cairo on their platforms, and they mostly use Windows for their dev systems (as does most of the games industry).
As for why Sony maintains WinCairo, I believe they use Cairo on their platforms, and they mostly use Windows for their dev systems (as does most of the games industry).