Everything is finite. Solar and other "renewables" aren't clean or renewable because the components don't live forever and their manufacturing requires rare earths which are a finite and very unclean to mine. AFAIK rare earths are not being recycled so we are just sweeping the dirty under the carpet and not really greenifying the energy. But for countries that currently burn coal anything would be an improvement.

Nuclear is finite but so is coal and oil and we are nowhere close of running out of it. New reserves will be discovered once there's demand. And used fuel can be recycled in breeder reactors.