There’s plenty of time to develop an alternative.
But have you noticed, there’s an objection one way or another to all energy sources. Nuclear is out, fossil fuels are right out, hydroelectric hurts fish and floods irreplaceable landscapes, wind minces birds, solar fries them right out of the air, pipelines pollute sacred Indian burial grounds and power lines are unsightly and likely killing us with electricity somehow.
It’s almost as if someone(s) wants us back in the Dark Ages.