Hi, it's true, but it means generate at once, if you do it again or manualy, you can have more. But you mean that if you have more than 50 variations woocommerce is not able to handle it?
As I wrote above - it's done. But have no idea how 🙂
It could be hint for you, there could be some issue for other users.
I have no idea why and how, but it works with keep trying. I think it was try #40 and #54...