[DANmode]

No - you're expecting a busy person to stop - now - and create a calendar or to do item indicating when they're able they should help you,

or risk forgetting to help you.

...or needing to scroll back through hours/days of messsges (ones that actually could be immediately answered or discussed, hopefully),

to find all the times they've agreed to help someone,

instead of you putting your (intricate, and/or technical request, from the context) into an email, ticket, or whatever you've all agreed upon.

I think that is the inflection point.

If you don't have a system in place, as an org, many people just don't think about it - find the closest, easiest text box, Send-Tweet. Or holler across the aisle of cubes at someone who is trying to concentrate...

[Spivak]

> instead of you putting your (intricate, and/or technical request, from the context) into an email, ticket, or whatever you've all agreed upon.

Emphasis mine, this is literally the point I'm making but from the perspective of an office that agreed to use Slack. Which is most offices that have Slack. If email or a bug tracker is the norm then you use that, and you would be equally rude if in that situation you tried to make them Slack you instead because "you don't check email."

[DANmode]

You've agreed to use Slack for communicating and organizing...everything?

I know that's probably what their marketing department would like to hear, but that sounds horrific unless you're doing something quite mundane.

Which...if you're reaching out with a request time-dense enough that someone asks it be forwarded to email...it sounds like you're not doing mundane stuff.

etc