Not nessesarily, but it tends to be slower moving and each element in the thread tends to be larger and better thought through. I find this means they tend to end up shorter as a result when you skip all the email signatures. There's also less sense of urgency to reply as well meaning you can set aside some time rather than feeling like you're missing out on the slack thread which may still be moving.
Other tools can work as well like shared documents if the content/context is several pages or something.
Other tools can work as well like shared documents if the content/context is several pages or something.