Yes, who would have guessed that the <textarea> element, designed specifically for this use case and built into browsers for 3 decades, would be the most performant and behaviorally consistent way to implement editable text.

I'm kind of sad the author stopped shedding unneeded complexity there though... we're not really building a text editor yet, we're building a website with a fancy input field. If we want to build a proper text editor we must eschew the bloat that is the web browser too.