Excellent video quality (on older iPhones) is relative to the screen size and resolution. Rabbit ears tube TVs have excellent video quality when everything is filmed to show up well on a limited screen. Put against 1080p and 4K TVs with UHD content, and the difference is glaring.

Older iPhones aren’t targeted for hacking because there are less of them out there with stuff worth hacking. But, they also don’t get security updates because the phone is too old to run the update. Known holes in the system don’t get plugged. And can get exploited, even by chance.

For me a moot point. Work requires specific apps that communicates with corporate which requires a certain level system and phone to run.

Not sure how it is with banking apps, and money apps such as Wing, Venmo, etc., but I’m sure they all have minimum iOS numbers required to run them.