2 cent suggestion ... wanna 'better way' of updating and upgrading? (especially considering one is now running a 3.9+ which is barely out of the shrink wrap and will have point release updates to fix code issues. Moodle releases updated code every week!).
That 'better way' is Git.
no 'moving parts' ... everything stays where it's at ... there's a set of cli only scripts in /admin/cli/ that when used in conjunction with git, will update or upgrade the entire site - minus plugins (which are perhaps best upgraded when your moodle says there is one available).
Like I said ... 2 cent suggestion ... but as long as upgrading is on your mind ... check it out!