Moodle site administrators are responsible for keeping it upgraded to the latest Moodle version and managing the Moodle site like the site backup, plugins update etc.
They adopt a lot of different strategies to keep your site updated, however there are some advantages and disadvantages for most of the them.
One of the Moodle community member “Graham Green” has posted his concerns about upgrading his Moodle site and got a huge response from experienced Moodlers.
Ken Task, Marcus Green, Rick Jerz, Derek Chirnside all came up with their response and best techniques of upgrading a Moodle Site. Even I am also feeling benefited by looking at that forum thread as it contains a lot of useful scripts, git usage and steps to upgrade your site.
You can also participate in the forum thread to post your way of upgrading the site. You can access the forum thread here – https://moodle.org/mod/forum/discuss.php?d=323960#p1300981
Do let us know in the comments below about the strategies you are using to upgrade your site.