(I work at Quill.) Everything in Quill is a thread -- which is quite a big shift from an IRC-like firehose (even with optional threading.) We've found the shift to have threading by default creates a behavior where you opt into just the conversations you care about, and don't have to skim through hundreds of messages to find what's relevant (or, say, replies to an earlier conversation.)
May be hard to get across the _feel_ of using a product in screenshots -- we're ramping up our invites (making sure things scale + features work as expected!) but we'll be fully open quite soon! :) (and, we might be slightly partial to dense UIs!)
May be hard to get across the _feel_ of using a product in screenshots -- we're ramping up our invites (making sure things scale + features work as expected!) but we'll be fully open quite soon! :) (and, we might be slightly partial to dense UIs!)