Until a major party comes out with a manifesto pledge to offer a public vote on moving to Proportional Representation I'm not sure why anyone would bother voting Conservative or Labour anymore.
I was just restating the question in a way that acknowledged your nitpicking response. It's a pretty natural inference from what you said. If you weren't suggesting that the referendums would have different results then I don't see the point of your original response.
AV was confusing. To those who knew what it meant, there were no obvious benefits, so why bother. To those who didn't know, the difference could only be explained by mathematics and unintuitive use cases, and no-one could make a compelling argument about why it was better, so why bother.
The argument for PR is far clearer. In the last general election (FPTP), Conservatives got 42% of the vote but won 50% seats; Labour 40% of the vote but 41% of seats; Lib Dem 7% of the vote but 2% of seats; SNP 3% of vote but 5% of seats; etc. THAT intuitively doesn't seem fair or democratic. PR seeks to reflect % of votes with % of elected seats, which does seem intuitively fair and democratic.
Im not sure why PR is being treated as a panacea. It has its benefits but I cant be wild about a system where, for example, far right parties pushing racial supremacy can get to play kingmaker like in Israel.
I wouldnt necessarily be against it but if I had limited political capital I could think of better things to spend it on than trying to make lib dem tory coalitions more common. The last one did sod all good.