Yes it seem to be the norm cameras do that, so far i have just tested 1 camera that do remember the preview selection, and thats the vantrue E2 i am currently testing.
If you go the wifi preview route with a cheap / old tablet or phone, well then you are also going to connect to the wifi every time the car / camera have been stopped, most cameras can not turn on the wifi automatic upon booting ( in the old days wifi on would also mean a drop in bitrate, but we are past that now )
Having the wifi chip going too, of course generate more heat too, but i have used this to test cameras for many years to generate extra amounts of heat, and i have yet to see a camera turn off all of a sudden.
Funny enough the Vantrue E2, it will also launch wifi on boot if you ask it to, you of course still have to get the app going on a devise and connect, not sure if there are a more easy way to do this, as a avid phone hater i do not know of any expert ways of using a phone.
Also i am not that big a fan of wifi, but in dashcams i do use it, must of course do that when someone send me a camera to test.
O yes, good old Denmark are on the downward slide, and we do almost have daily stabbings or shootings, as immigrant gangsters from MENA countries fight over the lukrative drug market,,,,, but ! i think we have some ways to go before we reach the state of at least some parts of " The windy city "
Ride share are not legal in Denmark, you must get a taxi license to earn money by transporting people around, it is one of a few licenses i do not have myself, that - motorcycle and bus with over 9 seats.
Some have a loophole though, they transport things, usually say a persons phone he have in the pocket or something, we also have pirate taxis, usually also run by immigrants,,,, you DO NOT want to go for a ride with them.
I would CC for sure too, actually i some times do, not a firearm, but a Applegate-Fairbairn shoulder holster with a big knife,,,,,,, which i have learned to use as a " kid "
also always have a pocket knife, even if thats also illegal here.
Of course not legal, but ! I assume the right to defend myself and my property in any way i see fit and morally okay,,,,, and i do not have a spaghetti spine like most of my fellow Danes have.
I would prefer a 9 mm, but that is a strait to jail offense here, so even if its just for a little while well, lets just say i have outgrown firearms as i have grown up, but there was a time OMG,,,, very naughty.