I finally caved and got myself a copy, because the spreadsheet capabilities of Excel are still unrivaled compared to free alternatives. If you watch the classic "You suck at Excel" video, you'll see that there are numerous actions the presenter does that do not have analogs in LibreOffice nor Google Sheets. The table feature is probably the one I miss the most; in fact, I really like how in the Mac program Numbers, all sheets are multi-table by default. It makes it much easier to group parts of the sheet into logical sections, and to extend one table without affecting the others.