This looks like a hugely significant move. Bot makers like myself have struggled with use cases for single-user bots, as obviously a large % of these use cases

This looks like a hugely significant move. Bot makers like myself have struggled with use cases for single-user bots, as obviously a large % of these use cases were competing with apps/website. Group bots will be immensely more relevant, in the same way that successful Slack apps often solve group problems more than individual problems.