If you actually care about your recipient having received it, your reason to keep it is to see that "Received."
The "Received" notification does not mean the text was read. The "Read" notification only means the message was opened. Not all received messages return a "received" notice.
The only guarantee a message has been received and read is an explicit reply from the recipient.No arguments with any of that, but if you're concerned about a message having been
delivered, waiting for "Received" is certainly a useful step, and if you neither see it nor get a response you're alerted to maybe resend.
A message's merely having been consigned to the "ether" is insufficient.
