This is true depending on the amount of updates and what your updating. Some updates require user input and will kill the cron. An easier and safer way to do it would be take 15 minutes out of your week every week to run apt-get update && apt-get upgrade on all of your servers, you can monitor the status and ensure there are no errors.I have always been told cronjobs are bad for updates, is this still true?
https://github.com/rmlhhd/scriptsCan you give me an example of the commands you are running?