There are actually a lot of factors here, although if I had to sum it up in one, it would be "the hardware can support it." But more seriously:1. There are a lot of security mitigations in modern Windows that add sometimes substantial runtime overhead, but offer significant protection. Writing an exploit for modern Windows is hard compared to XP SP1 and below.2. The graphics are a lot more sophisticated. Animation and transparency and lots of good stuff.3. There are a ton more "features" i...