[haspok]

You can enforce classification and privacy labels (or something similar) in Excel and other document files, at least in a closed corporate environment. Azure also supports this. Also, everyone has Office installed (in a corporate environment), anyone can open and work with an Excel file.

[jnwatson]

I don't have Office installed, nor do a significant majority of my peers. Given that sqlite is installed by default on Macs, a sqlite file is far more portable than an Excel file.