Keep in mind that for the people discussing this 10-12 years ago Excel had almost always had a limit of 64k rows. As another comment notes Excel 2007 is where t

Keep in mind that for the people discussing this 10-12 years ago Excel had almost always had a limit of 64k rows. As another comment notes Excel 2007 is where that was increased to > 1,000,000. If you were a recognized person in data science you'd probably been using tools with the 64k limit for at least a decade.