Does a $64 SSD have enough charge to flush pending writes after a power failure? If not, then be prepared for widespread corruption.

See comment by pjungwir.

You're already on a cloud system, so you have to have a plan in place for your instance to up and disappear without warning. If your instance has an unplanned outage of any kind, you kill it and spawn a new one. You may as well use libeatmydata and reap the performance benefit.

You are describing EC2. Most other providers do provide proper persistence.