I always miss that important SMS but not the email.
Sending the SMS to several people means that I'm charged (sms fee) X (number of people) and if it is email, sending to one = sending to thousand people.
There is no "reply all" option for SMS. It sucks when I have to take decisions via SMS. If it is email, all the people in the thread can see what the others say. Therefore, it is easy to make a decision.
We can have better control over email where SMS is uncontrollable. In another words, there are only few options to change in SMS settings.
There can be SMS lovers and they might have 15 reasons to love SMS. If you are such a person, you are free to share your ideas. These reasons represent my taste, needs and the facilities I have.