The whole DISCARDABLE thing was a relic of pre-NT versions of Windows, back when people were just beginning to realize that 640K was not, in fact, enough for everybody.  I&#x27;m surprised the kernel pays any attention to it at all anymore.  There&#x27;s not much upside to paging memory associated with drivers in and out.  Certainly not worth the additional attack surface that you get by making things more complicated than necessary.