[champtar]

AWS EBS volumes (except io2) have an annual failure rate of 0.2%, so if you have 1000 running statistically you will loose 2. For io2 it's 0.001%, but still not 0.

[matt-p]

io2 high durability is 1 in 100,000 per year.

S3 has 99.999999999% durability as standard.

I see your point that it's not technically 100% but, as close as can be reasonably achieved.

[UltraSane]

That is why you have snapshots on S3