Private != personal. At least I never ever imagined one could even assume DMs on work IM are personal private conversations. They're organizationally grouped as chat between to accounts, as opposed to group chat, but they're at work, for work, using work-provided tools...
Or put another way: why would anyone consider work Slack to be different in this regard than company e-mail? Much like with e-mails, the difference between DMs and group chats is whether the number of participants is > 2.
You’re right of course. I just wish we had something to fill the void that was left by in-person interactions vanishing. I think I’ll be doing WFH pretty much the rest of my life, and I absolutely hate going into an office in general, but there are definitely some aspects I miss. Being able to chat off the record with a coworker is one of them.
Unless all calls are transcribed and recorded, it’s pretty “watercoolerish”.