Outlook really has a lot of obscure features that not many people used. I think it’s good for them to cull these less used features and later re-add them rewritten in a more supportable manner.
I also really appreciate the emoji-reactions because I don’t have to type out a response expressing that I have read and acknowledge an email, I can just give it a thumbs up and move on, and they don’t receive a whole email to read, they just see that it got a thumbs up and can move on too