Those are good questions. I've been buying and running trail cams (no cellular ones though) since 2016. I run my cams 365 days a year in temps from mid 30's to as high as 108+. No snow and less than 20" of rain per year. Occasionally2 of my oldest cameras (both Cabelas) have had the PIR lenses crack and fall apart. A 5 YO Browning camera tends to reset he date back to the manufacture date in 2015 from time to time. All of the cams take good day pictures. None of the cams take great night pictures but I'm learning how to increase the quality of night pics with settings and background (not always an option). So far, I've found that you cannot get replacement parts for the Cabelas cams but can get them for the Browning cams. Not sure about the Moultries or Stealth Cams. I haven't run cams as long as JW or mrbb so I would say my data is not as useful for predicting long term (over 10 years) longevity.