In the past few years, people moved from using software installed on their desktop, to software they subscribe to online. Here's why:
10: Forget about buying software, subscribe to it
Buying software is expensive, and you probably don't need all the bells and whistles that come with it. When you subscribe, you pay monthly and typically can choose the level of service you want.
9: Less hassles; less worries
Desktop software comes with all the headaches of configuration, setup, and maintenance. With hosted software, just login to your account and get to work.