Slack discussion group?

[Adam D. Ruppe via Digitalmars-d]

On Tuesday, 27 October 2015 at 17:49:51 UTC, Andrew Benton wrote:
> Slack seems like it is becoming more and more popular.  Have we 
> considered setting up a Slack chat group?

What does it have to offer?

I know two groups who use it... and I kinda hate it. One of the 
users is a part-time client of mine, and I have the constant 
problem of missing messages, or seeing it one day, but since it 
is part-time, I don't get back to that job for several days... 
and go back and it says "you have more messages but are hidden" 
so I can't review what was said!

I just find it really, really difficult to use and don't 
understand its popularity at all.