If you look at Iowa alone, the wind share is around 40%.
If you look at MISO, then it is more like 10%.
The former is not really an accurate picture of how the system works. The latter, while it has its complications (especially distinguishing between MISO-North and MISO-South), is much more realistic.
Let me be clear I am not somehow against the development of wind assets in the state. Far from it -- I think it is a lovely development for the state. I just recognize it has its limitations at this point.
The wind is good, and every MWh you have off it is saved generation from coal or gas. But wind has the unfortunate habit of being "counter" to load -- people mostly need power in the day/summer, and wind is best at night/during the winter. Solar does a much better job of tracking higher load events in that way.
So we are still going to have that coal/gas/nuclear fleet throughout the Midwest to back the wind up for the foreseeable future. I think the next "big thing" is going to be large-scale battery storage.
Storage is what renewables need to truly start competing with thermal power for baseload and peak energy. Right now, renewables are just kind of "there when they are there," but if you could move the generation around, even just a few hours throughout the day, then the economics of this completely change.
Wind could also be really useful in a future with a ton of electric vehicles. You would likely charge them overnight, so the wind would pair up with that load shape very well to charge EVs.