Google Office docs are pretty acceptable these days unless you need really specific Excel functionality.

Don't want anyone to use that but that is good to prove that almost everybody can use a spreedsheat that is not Excel. Including LibreCalc. And many others.

The same situation is for email. Who needs Outlook? Nobody! You can do almost everything with Thunderbird. So does Outlook have some "special" things? Maybe, never used it!

I even had my email on clawsmail and it was amazing.