As I've said, DD learns the same way I do, which has caused me to joke that I have the user's manual to her brain (she says, "That's creepy"). The act of writing something down practically inscribes it into my brain (for instance, I find great value in taking notes, and then never again looking at them). In her place, if I were writing using inventive spelling, I would be inscribing that spelling into my brain... and it takes far more effort to unlearn an incorrect thing than to learn it correctly in the first place. This method would be toxic to me. In her output, I'm seeing exactly what I would expect to see, had I been put in her place.
YES!!
Right down to the "creepy" part. I think DD phrases it as; "Get... out.... of... my.... head..."
I feel very fortunate that because DD wasn't placed into a classroom setting at 5-8yo, she never learned "invented spelling" as a thing. She simply wasn't ever told that it was an option.
Because I have the user's manual to her brain, see...