That's not happening.

There is currently simply no viable substitute. (And don't tell me LibreOffice). Excel's mindshare is off the charts in the finance world.

Even if LibreOffice was anywhere close - it wouldn't matter...the finance staff wants what they already know & since they approve the $$$ they usually get what they want.

For certain tasks other applications may be more suitable, but as a general swiss army knife it's here to stay

We use Google sheets at work too - almost exclusively for shared trackers though which don't require any serious functionality.