[nephanth]

This feels like something that should be opt-in, not opt-out. It feels trivial to have all clients that support it send a header stating they do, and it is ridiculous that the default is to allow sending reacts to clients that don't support them

[kjs3]

It's a embrace-extend-extiguish play like the old days. Add a 'feature' that doesn't technically break the rules (or only does a little), get your users used to it (by making it the default, opt-out, etc) and hope that your users will pressure people not using your product to move. "What do you mean you didn't see my email reaction? That's the best feature in the whole world. You should really switch to outlook, etc.". See: every M$-only feature in IE.

[dpark]

How is this argument not just “no one should ever implement new features”?

I don’t really care for the Outlook reactions and find them out of place, but this implementation doesn’t break anyone else. It’s also exactly how Apple implemented reactions being sent to SMS recipients.

Disclosure: I work at Microsoft.

[Hizonner]

This feels like something that should not exist, period. For any email important enough to actually send, asking people to guess what a single-emoji "reaction" actually means is a recipe for bad communication.

[whatevaa]

Even in outlook those reactions look out of place.