The only effort involved on the IETF's jurisdiction was to stop squatting on 240/4 and perhaps maybe some other small pieces of IPv4 that could possibly be better used elsewhere by others who may choose to do so.
The IETF is not the Network Police, and all IETF standards are entirely voluntary.
Nothing is keeping you from persuading people to change their software to treat class E addresses as routable other than the detail that the idea is silly.
R's, John
