The finance team would give up cocaine before MS Excel. And they would give up water before cocaine. Now you know how important Excel is.
Oh please, stop it everyone with this thrite trope of the fabled finance guys with their crazy spreadsheet that holds the whole company together. 99% of Excel use is NOT that!
What MS365 does best (for now) is being a one stop shop for user/permissions/device management and coming with outlook/exchange/Teams - nobody with purchasing power gives a shit if ppl get Excel or LibreCalc as spreadsheet, they get it because it comes with the rest.