Texting is easy, convenient, and quick. It's great for arranging transportation, notifying people of changes in plans, or giving quick reminders.
Unfortunately, it *can* be abused, and I have one dd who has had some difficulties. We had to put some major restrictions on, and used parental controls for a couple years. She has straightened herself out, and now uses it responsibly and without problems.
She is on a dance team and gets frequent texts from her coach about changes in practice times, updates on what to bring or wear, etc. It would be a real problem for her if she didn't have it. It wouldn't be impossible, but it would be a real pain.