Windows 10 marks the age when Microsoft started offering Windows for rent, for a limited period Microsoft has long been lending software to corporate and end-users, its details are laid-out in the End User Licensing Agreement (EULA) Microsoft never sold Windows software to its clients, it is only licensed to use it indefinitely, the customer will just have to pay a 1-time fee to receive a copy of the program. SaaS is a hugely different paradigm since the software is considered a service instead of a product”]
Source: https://hackercombat.com/saas-from-the-lens-of-microsoft/