I'd agree UIs are a sh*tshow but just saying this misses the wide variety of things that can put under "language is usage". Of course, the article itself misses the way the reveals texts between current elites are more equivalent to the grunts of cigar smoking old boys in clubs than to formal business communication. And that's just scratching the surface of the implication of informal business and other language. "Is it laziness or power signaling?" - both in complex layers.

As a side note, I grew up in the era of typewriters and cursive and that "interface" was utterly miserable - composing at the typewriter was considered bad, a fair portion of people couldn't type and typists would/could be hired for various tasks. I was vastly heartened when PCs with word processors became available at the college computer center senior. I think text processing interfaces reach their apex around 2000s (fusing power and usability) but when something gets to certain optimality, it can only go down and that where phones are.