Thorium is unproven in a commercial setting, molten salt reactors in general are plagued with technological difficulties for long term operations and are limited currently to just a few research reactors dotted about the globe.
There’s no denying that originally a lot of the early nuclear reactors chose uranium because of its ability to breed plutonium for nuclear weapons proliferation but nowadays that’s not a factor in selection. What is a factor is proven, long-lasting designs that will reliably produce power without complex construction and expensive maintenance.