[grayhatter]

That's a trivial example to push to irc (but you already gave the same example I'm about to)

[username] reacted to message [username]: [message]

> In a business context that means missing critical acknowledgements of messages and generally forced our IRC bridge users to switch.

I'm not sure I'd willing call an emoji reaction to a "business critical message" acceptable. Either it's critical, and an emoji reaction (which currently doesn't generate a notification) isn't sufficient, or it's not critical, and someone (I don't mean you, speaking rhetorically) is wound *way* to tight! :D