At my previous company we used Tableau for a while and I was rather happy with it. I’m not sure what they are using now but I also build an excel exporter for common data and we also produced an excel file by hand for analysis so I would guess they are using excel now. I honestly would suggest to use a BI tool rather than going with excel but you might be forced in one or the other direction based on what the people…
My organisation has both Tableau and PowerBI. The only reason I have not dropped Tableau (as the principle account and contract holder) is that PowerBI licensing is restricted by users, whilst Tableau Server has an unlimited model.
So you don’t get a licensing key you can reassign to another user for PowerBI? (that the way I read that)