Users will soon have the option to use Outlook reactions to respond to emails received from people inside the same tenant (well, it also works with some other tenants). It’s the same kind of feature that already exists in Yammer and Teams, but whether this kind of response works with email remains to be seen. It’s a cultural thing!
The Teams developers are very proud that the new emoji picker expands the set of available emojis from 85 to over 800. No doubt some will welcome the increase. It will leave others cold as they wonder why Microsoft uses development resources to fill what seems to be an unimportant gap. In any case, the new emoji picker comes to Teams near you sometime soon. Enjoy!