Except that&#x27;s not true: Webkit, Gecko, Trident... they are all different &quot;OSs&quot; you&#x27;re writing for, you just wave them away by <i>shipping the OS with the application</i>. You could do the same by shipping a virtualised image running a stripped-down Linux configured to run only one application. One of these solutions is now socially acceptable, but both manage to completely discard everything the desktop OS achieved in 30 years.