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.
One thing I learned working with Apple as part of a large organization is that Apple really doesn't like creating carve outs of the rules. Especially if you are a larger dev. It's like they see it as a point of pride that the small developer plays by the same rules as large ones.