"Another new adjustment to the character limit is that usernames will no longer count when they're at the beginning of replies, giving users additional room for discussion. It's unclear whether all of these changes will occur simultaneously; certain content types may gradually stop counting against the character limit in stages. But the company will at least kick off the move next Monday.

"This is the most notable change we've made in recent times around conversation in particular, and around giving people the full expressiveness of the 140 characters,” CEO Jack Dorsey told The Verge in May. “I'm excited to see even more dialog because of this.”