Simply replacing Excel will be a massive challenge.
I root for it, but it will be difficult.
LibreOffice Calc: Free Spreadsheet Software for Windows, Mac, and Linux
https://en.libre-office.fr/article.php/libreoffice-calc-free...
give it a go. Ive never had problems for my use case.
I managed to convince my org to put up a Grist instance. I now use it for everything I would normally use Sheets for, plus a whole lot more. Row/columnwise permissions, file attachments, multiple views over data, python formulas...
It's a db not a spreadsheet but it's basically the tool I actually needed when I would reach for excel.
I feel like Excel is their one true moat. Everything else is a business play, but Excel is the only truly superior tech compared to the alternatives.
Excel is the most widely used document format, database, software runtime, GUI framework and note taking app. It gives Emacs a run for its money in how much you can abuse and overuse one application.