I think the truth is somewhere in the middle... it is somewhere between Sagittarius A* and the Solar System's barycenter. And for the humor impaired I agree that Munroe was referring to the barycenter.
There was a schism in 2007, when a sect advocating OpenOffice created a fork of Sunday.xlsx and maintained it independently for several months. The efforts to reconcile the conflicting schedules led to the reinvention, within the cells of the spreadsheet, of modern version control.
Unfortunately, a good bit of my job consists of using Excel spreadsheets to mitigate the shortcomings of an actual honest-to-Godzilla database. It's a *bad* database.
I, Satya Nadella, do hereby dub thee, reconbot, Knight of the God-Aweful Excel Sheets, may your courage and devotion become a shining example to the people of the M$ Empire Pro 2016 Ultimate.