You are likely to see my comment related to your other post, but this might be worth linking for others related to potential bike failures on trainers.
As mentioned above, I think there is potential risk from these hard and active efforts on a traditional, rigid trainer. Even the flex that the Neo trainers have is not enough to help with the high stress issues related to the lack of real movement.
If people want to really get into hard and active sprints on a trainer, using a motion device like a rocker plate is what I consider to be the best option. This adds a degree of freedom on the Roll Axis, which is where the excessive stress comes fr…