The price of electricity produced is an interesting metric to look at but can be very misguiding alone without more data around it.
It like comparing the price of rain water compared to well water.
The same way that solar is cheaper than nuclear, rain water is much cheaper than well water, you just need a roof with a gutter to get rain water.
Does it means that we should stop using wells and rely only on rain water and use water only when it rains ? Or do we also want to have tanks, do we need a backup for when the tanks are empty ? …
And we get these 100W from transforming food that we find on/in the ground.