I think that's a misreading of sections 40 and 41. I don't think that one aspect is spent.
For the parts of sections 40 and 41 that detail specific things that have been superseded, of course, those aspects are spent, but the intention of it clearly says that electoral matters are in the hands of Parliament, and that still stands, in my view, constitutionally.
You have to understand that Great Britain imposed various voting systems on different countries. Ireland is a good example. They imposed STV because they wanted to keep the different Irish groups apart, and then they would be weaker in resisting British rule. You see all those kinds of choices around the world. Now, it just turned out that it worked for the Irish and they liked it, so they kept it. It's one of those things that didn't work out.
However, in the Canadian context, Britain didn't do that. Probably the biggest influence on our voting system was the pre-Canadian voting systems that we'd already used in the united Province of Canada and the various colonies, so in that sense the politicians were just carrying on with what they did before.
Where people go wrong is in saying that our Constitution says that we should have a constitution similar to Britain's, so that means first past the post. Of course it doesn't, because while Britain used first past the post in 1867, they certainly weren't set on single-member ridings. There were multi-member ridings. They used the cumulative vote and the limited vote for different elections. They used STV for university elections, and all of this to the House of Commons.
If we're using the mother ship as our influence, then there are plenty of examples of their experimenting with different voting systems.