One of the things I like most about Slack is that they understand how important it is to be genuinely human in all interactions. More than just thinking about branding, and imagery and function, they realize that UX is about all experiences.
They do this really well, notably in places where you might not think to look such as the “app updates log.’
Thinking about UX, means thinking about all interactions that people have with you and how you want those interactions to feel, and what you want to share with your users at each point.
Here in this interaction, they aimed for humor and it worked. I laughed twice while reading these updates.