It's very hard to estimate the realistic minimum wind generation for an entire grid, I believe (same goes for solar). Sure, 0 wind for 1 month across an entire

It's very hard to estimate the realistic minimum wind generation for an entire grid, I believe (same goes for solar). Sure, 0 wind for 1 month across an entire country is unrealistic, but how low could it go, and for how long, and how often would such an event happen? You can't just leave critical infrastructure like power generation up to chance, even for once-in-a-century events. You must always have some kind of buffer to make sure there is no chance you will have to shut down industry and hospitals for a week (barring maybe war conditions).