CMK has database or anything like that. The only lost data is the same that is also lost if you use the normal site backup (/tmp directory).
But that is not important as most times you make a backup one time a day.
What is very handy is the Veeam method to create a standby VM on another host and actualize it one time per hour or so. That’s a cluster with possible data loos of one hour. Not bad for doing nothing 