Yes, this is important where you're online but not on a high throughput connection or any part of the connection has intermittent faults.
The disruption from even a few outages is enough to prefer to run things locally. We had issues with people unable to sign into Excel and everyone went mad (rightly so, as Excel was running locally not 365 but it blocked usage)
And on top of that, there are scenarios where you'd want to process substantial amounts of data that would be prohibitive to upload, process and return the results, where locally handling it would take way less time.
The disruption from even a few outages is enough to prefer to run things locally. We had issues with people unable to sign into Excel and everyone went mad (rightly so, as Excel was running locally not 365 but it blocked usage)
And on top of that, there are scenarios where you'd want to process substantial amounts of data that would be prohibitive to upload, process and return the results, where locally handling it would take way less time.