Design is hard.
There was a recent update to Slack for iOS and it said it paid special attention to the iPhone 6 and 6 plus. This is of particular importance to me because I am a 6 plus user and Slack is my most used iPhone app. Upon opening the app I didn’t notice much, but then I swiped to switch channels.
Woah, they made that wider, now it’s easier to select new channels one handed with my right hand. Sweet!