[usr1106]

I haven't used Excel for 10 years. I use LibreOffice Calc.

I have used it to chart data extracted from syslog, journald, dmesg. For example trouble-shooting in a Wi-Fi subsystem or boot time optimization work.

And of course all kind of project management type stuff. My job forces me to do that in Google Sheets these days. Action points, bug lists etc. are easily maintained in a spreadsheet. On one side it's a bit of a misuse of the tool, but as long they are short and simple lists with 10s and not 100s of entries it can be the most efficient solution.

The main drawback is that version history is a pain. If something goes wrong (wrong formula, wrong editing) it can be impossible to understand what happened and fix the problem afterwards.