I was really hoping for a scathing review of the old AT modem protocol. My understanding is it’s still what’s used by cell phones to communicate with their cell

I was really hoping for a scathing review of the old AT modem protocol. My understanding is it’s still what’s used by cell phones to communicate with their cellular modems. Back in the early nineties I spent a lot of time learning and using these commands to send files over the phone to friends without an internet connection. https://en.wikipedia.org/wiki/Hayes_AT_command_set https://en.wikipedia.org/wiki/Hayes_AT_command_set