Successive UK governments have brought forward proposals for the second chamber to be elected. There is also pressure in Canada for the appointed Senate to be elected. However, it is notable that there are some American commentators arguing that the USA should move in the opposite direction. Members of the US Senate were originally appointed by state legislatures. It was only a century ago that the position changed, with the 17th Amendment providing for direct election. There are now calls for the amendment to be repealed.
There is certainly a case for some change in the USA. Present events demonstrate the problems associated with a fragmented system, which militates against, rather than enhances, core accountability to electors. The chances of fundamental reform, though, are essentially non-existent. The culture could not accommodate a change from the present dispersed system. A repeal of the 17th Amendment would, though, be interesting and certainly revert to the intention of the Founding Fathers. Somehow, though, I cannot see the Senate supporting such a move!