An issue everyone seems to overlook is that an SaaS typically needs to be scalable to the entire world while your on-prem service pretty much never does. The S

An issue everyone seems to overlook is that an SaaS typically needs to be scalable to the entire world while your on-prem service pretty much never does. The SaaS will have more moving parts & operator activity which in turn makes outages more likely, and that "operator activity" can't be planned for unlike on-prem where you can schedule maintenance out-of-hours to make sure any accidents don't affect the business.