I don't really see that as the same thing as what the article was pointing out. Those are shibboleths that only an insider would know. You have to get the pronunciation of Cholmondeley or Couch "right" to pass for an insider.
The random misspellings, missing spaces, sloppy grammar, etc in the examples in the article seem different to me. Misspelling "en route" as "enriewu" doesn't show, "look, I know the secret country club spelling for en route". It simply shows that you don't have to care about your mistakes. You write something that approximates what you mean, and you're too important to spend time revising. The mistake could be "enrout" or "n route" or on any other word. But you're not going to be a try-hard who edits and frets over their messages, you're blessing someone with 10 seconds of your attention and they're lucky to receive your correspondence, typos and all.
It's absolutely a power move, but it's also what happens when people are surrounded by sycophants who never correct them and will take time to decipher what they mean.
And over years, sloppy typing (forgivable) evolves into sloppy thinking.
The "enriewu" thing wasn't a misspelling of "en route", it was someone's name who had arrived in Miami with Jean-Luc and Peggy. It's probably a misspelling of Henry pronounced in French.
You could also blame the constant negative press covfefe
I don't necessarily think it's that... it's just a matter of a rush to respond/send quickly and not take a lot of time. It's pretty easy to either fat-finger when typing on a keyboard, or gesture input on a phone to get the wrong word and you hit send before realizing.
Sometimes I'll notice right after, delete and re-reply (social media) other times I'll just let it be... It's pedantic busy bodies that will single you out for a typo as opposed to discussing the idea at hand.
>It simply shows that you don't have to care about your mistakes.
Interesting, is that the equivalent of billionaires wearing sweatpants?
Or its a simple signifier that the author was human, and that a real person is trying to convince you of something. I've experimented with putting minor grammar mistakes into my work of the sort that would be frowned upon, but are not strictly invalid. The existence of any kind of mistake makes the work sound "human".