Meanwhile, my 500-person company switches from MS Office to Google Docs like it's no big deal. Because it isn't. Excel isn't the main skill, using spreadsheets

Meanwhile, my 500-person company switches from MS Office to Google Docs like it's no big deal. Because it isn't. Excel isn't the main skill, using spreadsheets is. Formulas, tabs, references, filters, sorting, pivot tables, scripting, blah blah blah. Apart from Excel specialists with highly specialized workflows when the rest of your finance department is also using the same, nobody cares whether you're good at Excel. They just want something to easily tabulate rows and columns of data and get some insight of out if. LibreOffice does that as much as Google and MS. Don't put "LibreOffice" on your resume, put "spreadsheets" and 95% of the time it won't make an actual difference anyway. You can learn the location/naming of most relevant functions of your employer's preferred spreadsheet app in a matter of hours and then you know several tools, which is always better than just knowing a single one and puts you ahead in other ways.