I believe that Azure style billing based on actual utilization seems more fair than licensing based on "users" or on-prem CPUs that may be underutilized most of the time. As an analogy: unlike the early days of the 20th century where electric companies would sell you the super expensive on-site generators and then require you to hire full-time engineers to run them, we now have power service providers who generate power regionally and then bill you based on usage.