Like issues with uptime, risk of backdoors, privacy concerns, etc.?
Using Raspberrian Bookworm, input connection is through an ethernet cable and the hostpot was set up through Pi-Apps’ hotspot tool and is using WSA2 and password, but nothing else to note.
Not much info I could find through articles online.
Yes. They do make long lifespan SD cards for things like CCTV recording, they cost a bit more but might be worth taking a look at. I know people running more critical systems on Pi 4s and Pi 5s will use something more durable than an SD card nowadays, like an actual SSD.