Text messaging is way more than one-to-one communication. It can be used to update status on a variety of social networking platforms. Take notes. Contact multiple people at the same time. Social networking. Social enhancement. Information retrieval. Information management. All through the SMS and more. Heck you can get the word of the day sent from the SAT/GMAT/GRE people.

To be honest I'm quite horrified to see the level of pedantic generational bile being spewed out of outright ignorance and stupidity.