You're treating two different forms of communication as if they were the same. Slack is organised by person and topic, while email is just a large sack of messages, possibly ranked and divided in a few folders. I find Slack's model much more efficient.
The problem I have with Slack’s model is that it’s inflexible and I’m unable to organize things in a way that makes sense to me. With email the only constant is messages and threads. I’m free to organize or tag these artifacts however I want
