I have seen quite a few old-school 14.4 and 28.8 modems still in use at customers sites.
These are mainly used for the fax capability and are quite reliable over analog lines.
I still have my US Robotics HST V.Everything modem that was the crown of my home system when I was in High School.
Great memories. The BBS's were sooo much faster and easier than the 'internet' back then. File transfers over HTTP were dog slow compare to Z-Modem protocol.
I have had more troubles with new 4-port fax cards that with the old reliables. In any case, I still need to use my old-school AT commands to configure the fax-modems from time to time.
Faxing is a real dinosaur. I believe it goes back to the 1930's when the newspapers used it to transfer images.
We need, need, need some method of standard, secure file/image delivery. It really cannot be that hard.
Mail server 1: Hey are you who I think you are?
Mail Server 2: Here is my card.
Mail Server 1: OK, I want to send this package to you.
Mail Server 2: I am sending you a lockbox.
Mail Server 1: OK, I put my package in and sent it to you. I cannot open it though.
Mail Server 2: Got it. I opened it up and looked at it. Is it 10 inches long and black?
Mail Server 1: Thats it. I will tell my user the package was delivered.
Mail Server 2: Bye!
SMTP is another one of those things that is antiquated and needs update. But one of the problems with updating standards everyone uses is actually getting everyone to change. (see ip4)