Well, this thread is definitely giving me some good tips for what words and slang I should use online and singlehandedly revive (even if that wasn't the intention of it). XD
Now to answer the actual question, I do remember emoticons (not emojis, but their predecessors that used letters and characters already on your computer's keyboard to type out faces and symbols in the not so olden days) being more common when I was a kid compared to now, even though I'm pretty sure the usage of emoticons was slowly declining by then.
Also, this slightly predates my time, but on a related note, I did hear that people used to say "get pwned" in video games around the 7th generation console era.