The main issue with Excel is that it is not multithreading in all operations. But for a lot of things it is the only software that can fit the bill.

Libre office feels a lot worse in to work in up to 8 hours a day compared to Excel and it is probably still missing some features like powerquery among others. I do need to test it again, it has been a while.

Then again I work as accountant so I am probably in minority of Excel users.