One major roadblock is there is no concept of separate identities managed under one login, or switching accounts easily. I think there is a half-way-there "server nickname" option new this year but it's not quite the same. The primary motivation for most is a clear separation between personal and professional.

https://feedback.discordapp.com/forums/326712-discord-dream-...

https://support.discordapp.com/hc/en-us/articles/219070107-S...

Anecdata:

https://news.ycombinator.com/item?id=14870899

https://news.ycombinator.com/item?id=14865292

Some people consider this a positive.

https://news.ycombinator.com/item?id=14093132

https://news.ycombinator.com/item?id=14089417