Possibly not an issue if you’re all in on Apple land, but then you’ve got the differences between how each platform display that specific emoji! An example would be dizzy - the only version to convey dizziness to me is the Microsoft and Facebook versions really - the others look like shooting stars or something!
We were recently advised to use them more in communication at the University as it can help to prevent miscommunication through email and text (in chat, not in any documents) where people might misconstrue how you’ve messaged them. I haven’t yet.
Using them as tags within items might be helpful, but I haven’t really used them for that. If they were in notes or similar, they’re more for decoration I guess at the minute.