I've found it's often impossible to get keyboards like Swiftkey to stop autocorrecting "ok" to "OK". It's so irritating because while grammatically correct, it makes me look like a boomer in text conversations.
You bother with your shift key and putting quotes around pertinent terms in HN comments. Hence, I'll deduce that you do care about grammar and presentation when random strangers from another country get to read it and comment. However, I'm also sure that you (and so do I) prefer a more relaxed presentation when dealing with your mates.
If the recipients know you then they know you! If not: who gives a shit?
Now, do tell what is wrong with boomers? ... 8)
i like to confuse people by switching from 'k', 'ok', 'okay' within the same chat
Whereas I haven't ever seen "k" in a neutral context. Seems to me, this one is overwhelmingly used for sarcasm or awkwardness, so I think it carries a stronger message of disapproval than "ok"
...and then there is "kk" which is the exact opposite of "k" and is basically an extra-chill "ok".
Or maybe I'm just imagining things of course...
The finest slang of this generation - is it even current anymore? - is "yeet". A word that you can know the meaning of purely from context. We never had anything that rad (heh, heh) back in the 80s.