Not only is it high cost, but it has a huge land footprint v. coal, gas, and nuke, and you proportionally don't get anything close to the return in megawatts. And many of the numbers on the input of renewables to the grid are based on rated capacity, not actual generation, which for wind and solar are highly variable.
The other tricky dicky switcharooney they pull is to make big swagger claims of how much 'renewable' energy supplies the grid. What they hide is the fact that a significant amount of that is hydro, around 40%, of which almost none is newly built, and will never be allowed to be built by the environuts.
Take that out and the percentage of wind, solar, and the rest are south of 10%. How many millions of acres have been slathered with windmills and solar panels for that paltry added generation?