If you think there's no lock-in I don't know if you understand what's going on here fully. Slack has lock-in from day one: as soon as people use it, it's hard to move away. We're an organization of 50 people and ripping out Slack, changing user habits and even getting all of our data out of there would be a _massive_ pain – so we'll never do it. This absolutely discounts how high the cost to your employees of continually switching tools is.