Small one, but it was overdue: pasting a link into Community chat used to give everyone a wall of text to copy out by hand. Now it's just a link.
Paste a full web address — https://... or www... — into any channel, direct message, or thread reply, and it shows up clickable. Tap it and it opens in a new tab, so you don't lose your place in the conversation.
Works on everything already posted, too. That product link somebody shared last month? Go tap it.