If you listen to utility executives talk (and they have to talk a lot to wall street), they have been very clear for about 30 years that the number one reason they built everything other than nuclear was cost.

Consistently 2-3x the cost of wind or gas on an LCOE basis. And new build cost is about 7x as high, which has to be amortized over an extremely long period, which rates regulators do not like utilities doing.