> If you want the premium features, their pricing is very affordable.
"very affordable" is up to each person to define. One of those premium features is a history with more than 10,000 messages.
I frequently interact with at least 25 people just to do my job. The cheapest paid plan is $6.67 per user per month. That works out to $2000 a year. And that's only for the people I work with on a regular basis. Sure, I could afford that, but it's certainly not trivial. Email looks like a good alternative at that price.
How much time do you have to spend setting it up, maintaining it, documenting your set up, etc? While OSS has no upfront costs, it does cost in terms of dev and admin time.
You pay that for every Slack user, no matter how many or few messages you exchange with them. I don't think someone else is going to pay $6.67 to replace ten email messages.
"very affordable" is up to each person to define. One of those premium features is a history with more than 10,000 messages.
I frequently interact with at least 25 people just to do my job. The cheapest paid plan is $6.67 per user per month. That works out to $2000 a year. And that's only for the people I work with on a regular basis. Sure, I could afford that, but it's certainly not trivial. Email looks like a good alternative at that price.