For many executives, Excel is the only tool they know or can imagine. Even some in the IT world; all lists of things in Excel sheets being emailed around for updates.
I've had people who would have asked to get their email in Excel if they thought I would be willing to make it happen.
I've been wondering if the signal is keyed to the shifters to prevent interference from someone next to you in the pack. I should look at the technical notes even though I have no intention (or money) for upgrading