Re: EMET was always the wrong end of the problem.
"I note that other OSs have subsequently implemented a number of the technologies introduced in that toolset."
Indeed several OSs implemented them several years before MS did.
The Linux PaX project first coined the term "ASLR". It published the first design and implementation of ASLR in July 2001. (http://en.wikipedia.org/wiki/Address_space_layout_randomization).
Microsoft's Windows Vista (released January 2007) and later have ASLR enabled for only those executables and dynamic link libraries specifically linked to be ASLR-enabled. For compatibility, it is not enabled by default for other applications. (same ref.)