I use it when I need to do quick reviews and edits of other people’s documents in word (and now they seem to have made the change tracking/display stuff a lot more robust) and i do a lot of stuff in excel (but create spreadsheets on my mac because up until now, while you could display and edit stuff in excel, a lot of stuff you couldn’t add in the first place). Excel is still missing a lot of important things, looks like. But maybe they‘ll get there - after all, there are now ipad pros that have hardware as powerful as macs.