OMG WTAF, Microsoft Outlook now allows reactions (thumbs up, hearts, etc.) to emails. Except I don't use the Outlook client. So once a day I get an automated email with all the reactions others gave to my emails. And now I have even more email.
@Riedl this has been a thing for a while (I think over a year) in the website version of Outlook. But the desktop app is an entirely different situation (no reactions). AFAIK they're still being developed by separate teams.
I've honestly "reacted" to quite a few e-mails, but have never seen anyone else do it before.