The problem is that a product like Slack does not wear down, you do not have to replace it every second year, so there's no good opportunity for a competitor to

The problem is that a product like Slack does not wear down, you do not have to replace it every second year, so there's no good opportunity for a competitor to sell a replacement product. It either have to be an order of magnitude better, or you have to sell it as an alternative, not a replacement, to customers that not already have their needs fulfilled. So when people search for a team chat product, first you need to make sure people know that your product is an option, but not only that you need a very good explanation of why they should pick your product and not the most popular one.