Isn't there a third option: redundant overhead power lines?
In the transmission (long haul) part of the grid, there's already a lot of redundancy. But not as much in the distribution (last mile) part.
If you increase redundancy, you should be more resilient to e.g. trees knocking out power lines because there are multiple paths in more parts of the network.
I doubt full redundancy (two lines to every customer) would be realistic, but an increase in redundancy seems like a more practical way forward than just starting over completely with underground lines.
In the transmission (long haul) part of the grid, there's already a lot of redundancy. But not as much in the distribution (last mile) part.
If you increase redundancy, you should be more resilient to e.g. trees knocking out power lines because there are multiple paths in more parts of the network.
I doubt full redundancy (two lines to every customer) would be realistic, but an increase in redundancy seems like a more practical way forward than just starting over completely with underground lines.