This is obviously 99% marketing. Microsoft/Waggener Edstrom tend to be really good at getting mainstream media to report on the marketing activities.
Example: For many Windows launches since Windows 3/95, there's been this media splash where Microsoft spends x million dollars on marketing and mainstream media then reports this, thereby getting (like) 100x millions worth of exposure.
Let alone the date issues.
At one point I did a deep dive on one or the other of these "quirks", and the earliest request for exactly the fix I want is from nineteen-eighty-fricking-five. Unbelievable.
I'll admit, on occasion having more than 65k rows is helpful but generally that's the domain of a database, not excel and it wasn't a good tradeoff IMO