I think that's it exactly. Hopefully we're not looking forward to "phone that's too big, and unfolds to be even more too big."
I can see a large unfolded phone being desirable if it had a stylus and I could use it like a small notebook, but just as a "watch Netflix bigger for $2000" device, no.
Especially if it has the worst camera of all of the phone models like the Air does.
You'll want a replacement stylus 10-pak.
Somehow not a problem I have - still have my original 2018 iPad stylus, and I don't lose regular pens either.
Suspect this is a mindset thing if you mostly use 10 cent Bic pend. Even something that costs a few bucks (Signo UM-151 for instance) I know where they're at.