For my workplace, I built an internal orgchart and the backend is entirely Google Sheets. It's been completely hassle free and I've spent almost no time on the code since building it three years ago. As employees join and leave, HR adds/deletes a row in the sheet and only they have access to the "database" besides myself. In case of accidental deletion, there's the handy restore ability built into sheets so a database "rollback" is also trivial and can be done by HR without my input.
Sheets as a database for light web apps is absolutely joyful to build with.
Sheets as a database for light web apps is absolutely joyful to build with.