I don’t use email at work anymore because it is siloed to the original participants. Someone on the inside needs to know to forward the whole thread to anyone who needs the information after the fact. This info is lost forever when participants leave the company. With Slack I can search through conversations where the participants are long gone. It is not the end all be all of communication, but the auto-documentation aspect is way improved over email.
> I don’t use email at work anymore because it is siloed to the original participants.
For many people that's a selling point. I practically beg my teammates to ask questions in the team slack channel instead of DMing me, but they never do. I think it's stage fright and wanting to reveal ignorance to as few people as possible amplified by various higher up people joining the channel. Also compounded by tons of people from other teams joining our channel and no one pushing back because "we want to have an inclusive conversation" or similar platitude.
> I practically beg my teammates to ask questions in the team slack channel instead of DMing me, but they never do.
I would probably be one of them (although I'd be more likely to email you if that's an option).
If I have to ask my stupid question in public, I'm more likely to simply not ask it at all -- especially if management or people who are not on my immediate team are in the Slack channel.