No idea what problems people had with Atom, but I really hope some fork let it live on.
No we didn't, because on a computer it doesn't require any meaningful extra effort (unless you're a lazy kid -> another age indicator), and pre-smartphones... texting actually used to cost money. You'd probably have a plan of some 1000 free text messages / month, or sth., which isn't that much if you're a teenager, given that a text messages was limited to ~140 characters (yes, that's where Twitter's limit came from - SMS compatibility).
Caps, instead of being waste, let you skip whitespace. Instead of writing "caps are a waste", you'd write "CapsAreAWaste" (and then possibly shorten it to "CapsRAWaste"). We'd cut the message length by some 20-30% this way, which mattered for longer messages - it would turn a 4 SMS long message into a 3 SMS long one. We'd of course optimize harder when we were close to message length boundary.
Being efficient with text messaging was a critical social life skill when I was young.
(Damn, it's hard to find a "list of emoticons" (or even "usenet faq") from back in the day now. So much more recent stuff clogging the search results.)
Anyway, this list of emoticons from '94 (according to the internet archive) is a pretty good representative of the sort of thing that people passed around then:
https://ia802801.us.archive.org/view_archive.php?archive=/23...
As you can see, most have noses.
Also, RFC-1855 (Netiquette Guidelines) from October '95 has one example of a smiley in §2.1.1: "Use smileys to indicate tone of voice, but use them sparingly. :-) is an example of a smiley (Look sideways)." I suspect that at least one of the bibliographical references provided would have contained a decent list of them at the time, but so many links are dead now. (And even if some of the ftp ones still exist, most browsers have dropped ftp support now, so most people are kinda SOL there anyway.)
I want to make a "kids today" joke/comment, but it's more of just the pace of trends/fads not the people per se. I’m actually a cosmic entity that views time as an artificial construct. When you’ve been around for centuries like I have, you’ll understand that trends/fads are mere points in the time space-continuum. Don’t get bent out of shape when you see one.