The issue is that people are usually members of multiple organizations on Slack, most of them free but some paid. A change like this that retroactively impacts

The issue is that people are usually members of multiple organizations on Slack, most of them free but some paid. A change like this that retroactively impacts non-grandfathered chats (especially chats which are low usage and likely low infra cost) is going to alienate people who may at some point have decision-making power over an organization’s choice of paid chat service.