There are two big roadblocks to a high percentage of virtualization in most data centers; cost and efficiency. Analysis tools like Akorri or Tek-Tools can identify virtualization hosts that have additional resource capacity (compute, memory, network IO, storage) They can then present a list of those servers that will be the next best candidates for migration to the virtualization environment. Each of these virtual servers still must be managed by IT personnel. The efficiency of the personnel is one of the key enablers to complete virtualization.”]
Source: https://www.darkreading.com/database-security/roadblocks-to-virtualization