There are many features of Excel that LibreOffice Calc doesn't support. Most importantly: structured references, VBA, PowerQuery. Not to mention its UI is very laggy even on powerful machines.
For real financial/business work, Calc is just not a serious player.
I even had to switch my reading list spreadsheet over from LibreOffice to Excel when the former started seriously lagging with about 250 rows total
I think there is a recent performance regression but hopefully will be fixed soon. Hasn't affected me. Learn Python, much better than VB.