Another reason why not to "wait for an update for Excel" is that one of the perks of Excel is it's very long-lived data formats. People may be using Excel 2003

Another reason why not to "wait for an update for Excel" is that one of the perks of Excel is it's very long-lived data formats. People may be using Excel 2003 to work with you on a file you created in Excel 2019. You have to go all the way back to Excel 2000 to lose the ability to work on modern documents.