Fair points
I travel a lot for work
Screen size isn’t a problem, it’s not like I need to stare at it, left or right or straight ahead.
Data isn’t an issue...as I don’t pay
You can turn notification off so no texts.....and if a call comes through the name of the caller pops up straight away giving you the choice to answer....hands free at its best.
I have off road maps but rarely use them as everywhere is sign posted pretty good these days.
Re: no reception......if your route is locked in before you go out of reception than it continues to work just fine....the only issue is starting from a no reception area which is rare given I normally know my way back to reception. In the cases where I don’t I load the phone up with all my travels for the day before leaving reception.
Personally for me, I don’t need to buy another device to hang off the windscreen.

