With the level of software and hardware redundancy as standard, you have a level of protection you just can’t get from owning your own equipment. If a failure is suffered the self-healing systems immediately start to work and your disaster recovery is managed by Cloud technology.
There is, of course, the functionality to do a test run before completing your move to the cloud.
Another plus is that contracts do not tend to be overly long allowing you to move to another provider if you wish.
All of this means that the Cloud solution is much more cost effective than if you were to buy up front or long-term licenses for software and had to invest in the hardware to run it.