Some of us used some of the misnamed “text message” abbreviations 20-30 years ago on email, usenet, and BBS.
Yep, Right-on IMHO from one old fogey usenet user to another. Most of the abbreviations started there way before the web or the internet (and “smileys” as well). Just wasn’t as well known. OBfact - most of the old usenet posts are available on Google. Look up kremvax for fun or just your own old posts.