The reality of this is really that Canadians in general don't vote, have a poor political understanding of how governments work anjd basically don't give a damn.  In addition, the Conservatives and the NDP were pushing for a referendum which would have likely been negative to change.  A third thing , but not last, proportional voting is just as stupid as first past the post and additionally involves putting people into Parliament who have not been elected by the people but to fulfil proportion numbers.   It was a great idea, and may come again, but as a large percentage of Canadians are politics poor it won't be soon.