https://www.windpowermonthly.com/article/1347145/annual-blade-failures-estimated-around-3800
.54% blade failure rate per year or 3800 known instances. Doesn’t strike me as very rare.
Multiply that over a ten year period. There will probably be a near 100% failure over 10 years.
At least when they fail bird lives are saved....
We ( my wife and I) were in Puerto Rico a couple of years ago. We drove past a whole wind farm that was destroyed by a hurricane. Every single blade was broken off to some some extent.