My rule for students is basically, "If you have the option to be re-specify the thing you're talking about, do it." That's a solid rule for standardized tests, and usually applies to everyday writing (I'll caveat that this rule clashes with "the simplest answer is the right answer", so it is dependent on the actual sentence rather than an "all-or-nothing" rule).
Other common mistakes are those you hear about in middle-school (that's not a knock on anyone; rather, I say that to prove how long-ago it was that most of us ever reviewed common grammar and writing rules):
"Let's eat, Grandma!" vs. "Let's eat Grandma!"
Tying this back to GPT, I've read (and seen) folks write without any punctuation whatsoever. I can't speak to how GPT truly handles that, but if it's anything like "normal writing" and understanding, then punctuation is hugely important.
And yeah I split the infinitive above on purpose
Forcing the construction “not to use”, in contrast, ends up creating a garden-path sentence as the reader awaits what the solution actually IS (anticipating “the solution is not to use… but rather…”)
Split infinitives get a bad rap because they have no equivalent in Latin, and 19th century grammarians got fussy about things like that. Use them freely!
My mom took my grandma and I to her favorite store
My grandma and I went to my mom's favorite store with her
“My mom, grandma, and I went to my grandma’s favorite store.”
If you think using Grandma three times is too much, you could replace the first Grandma in the second sentence with “she.” For instance, “she, my mom, and I went…”
Shouldn't that be me, not I?
Or if you have an English major:
> Encased in the golden fabric of familial bonds, my sweet mother and I stood by the side of my Grandmother as we embarked upon a journey to that venerated haven of retail, which our venerable elder unequivocally deemed her most beloved store.