[stevesun21]

I think it's not quite right and fair as people keep comparing email vs Slack. Email is a open info transfer protocol, anyone can create their own email system as long as they follow the email protocol, however, Slack is app and owned by a company. Yes you can say it has some advantages than email, but, I hard to believe that people willing to shift from a protocol to a specific software – this sounds to me like people give up on buying appliances which computable with standard power outlet, and get started buying appliances from a specific brand and these appliances can only plugged into this brand owned power outlet. I think this is ok as long as you are a big fun of this brand and bless the it will not be disappear early than you :-)