I used to use AIM semi-regularly years ago, though through third-party programs such as Trillian and Pidgin, to chat with some friends from forums that I frequented at the time (and some of which I still do now).

Though this news is bittersweet; I will say, though, that the writing has been on the wall for the past several years now as virtually everybody has migrated to Skype and more recently Discord for their instant messaging needs.