Two is one and one is none. Drives fail, servers fail, keys get lost, accounts get compromised, planned deletions get fat-fingered. Modern cloud APIs make it t

Two is one and one is none. Drives fail, servers fail, keys get lost, accounts get compromised, planned deletions get fat-fingered. Modern cloud APIs make it trivial to build redundancy into your system. Usage-based pricing and nearline storage makes redundancy relatively cheap in most cases.