HiveOS update and/or upgrade

Hello miners,
How do you upgrade HiveOS manually or automatically? Do you just use selfupgrade or you do full system upgrade (apt update && apt upgrade), because selfupgrade only do update from hive repositories not debian, instead of that system update only do update from debian repositories.
What is recommended by HiveOS selfupgrade or both system update and selfupgrade, and if both in which order to run commands?
How often do you run selfupgrade, every release or just when release have updates that hits your rigs or at specific date and time?

I used selfupgrade first then the others