[Clubber]

>>Also, one thing with those in person interactions is you have no artifact of the interaction. Slack or tickets are great for documenting how decisions are made.

>Forcing people to search through Slack archives works when the team is small and company is new, but it becomes useless at scale.

The OP was comparing it with someone walking over to his desk to tell him something, which if you are busy and eager to get back to what you were doing, is easy to forget. At least Slack has a record while vibrations in the air have none. He also said Slack or tickets, so you weren't even attempting to refute his actual argument.