I'm not one of the dual booters mentioned, but the desktop version of Excel specifically has several important features that the online version flat out doesn't support. Primarily I'm talking about creating and running data queries, which is useful for analyzing data and generating reports from remote data sources including external files like CSV and online databases. You can do all this without Excel of course, but this shows the online versions are definitely limited.
I'm not one of the dual booters mentioned, but the desktop version of Excel specifically has several important features that the online version flat out doesn't support. Primarily I'm talking about creating and running data queries, which is useful for analyzing data and generating reports from remote data sources including external files like CSV and online databases. You can do all this without Excel of course, but this shows the online versions are definitely limited.