No, they haven't gotten rid of Teletypes, they still live on in the minds of all of us TTY repairmen and probably all of the operators, along with all of the Kleinschmidts and the KL-&s. Those of us who really loved our jobs, no doubt still could repair them now no matter how long we've been out so they still live, long in our minds...at least in mine.
I just ran accross this thread. I remember picking up and AUTODIN packages destined for AFPC in 80 column cards from the comm center and delivering them to Data Automation or DPI for processing (1970's - 80's). I also remember having to do disaster recovery for over 5000 cards using what would be similar to today's manual label maker guns (ouch). There was no such thing as a backspace once you made a mistake, lol. I sure was glad when we were able to do the same using virtual images (90's).
No, the USAF does not use AUTODIN. The system is supposedly dead, however vestiges of it are still around. Actually saw an ad for COMM CENTER personnel familiar in AUTODIN last year.