Slack's new logo is a playdoh swastika
Behold the Brostika! Like the hidden arrow in the FedEx logo, Slack's new brand has a negative-space surprise in store. The bars point the "lucky" left way, at least, rather than, well, to the right.
Here's their "Logo explorations for the octothorpe." Octothorpe is a fancy word for the pound/hash symbol, which they have somehow managed to turn into a contact sheet of procedurally-generated swastikas.