Uranium solves the immediate and pressing problem of moving away from fossil fuels, which are worse in every single way. Thorium addresses the concerns you raise around the cost of uranium becoming uneconomic to mine. So, not sure what the except here is to be honest.
Except that Thorium reactors are still experimental and will definitely be much too late to replace fossil fuel
Uranium solves the immediate and pressing problem of moving away from fossil fuels, which are worse in every single way. Thorium addresses the concerns you raise around the cost of uranium becoming uneconomic to mine. So, not sure what the except here is to be honest.