That's the point. If you mess up your db doing something you want to lose all the data since you created the snapshot. >You've been able to do this for years

That's the point. If you mess up your db doing something you want to lose all the data since you created the snapshot. >You've been able to do this for years on Linux with LVM anyway. What's the point of saying this in that tone? I could achieve the same goal in a number of different ways - that doesn't make any of those methods invalid because another one exists.