[ecnahc515]

Slack has an option to display full names, which you can set. An admin can also make that the default.

Secondarily, the reason for @username is because you basically have to use usernames of some kind to ensure you can directly refer to another user consistently. Users can also setup "highlight words" which will notify them if someone says them in a channel they're in. This could be their name for example, or other things.

[pc86]

I set up a Slack channel for the PTs at the gym my wife and I run, and have defaulted it to real names and I get an alert for my first name, our last name, and a handful of other words. Having never used Slack before I was pretty impressed with the customizability of it.