Maybe Joomla! core itself is featuring an auto-update option? The Akeeba CMS Update extension used to do just that. It's now discontinued:
Joomla! is now version 3.8.11.We have transferred our improvements to Joomla! and they will be integrated into a future version of Joomla! 3.5 or 3.6.
Regarding updates, the documentation states that:
So I'm guessing that's a no on the Joomla! core auto-update feature?Joomla will notify you on your Administrator home page (control panel) when an update is available. It will not automatically do the update for you. It is the responsibility of the administrator to start and verify the update was successful
Maybe a current extension auto-updating Joomla! could do the job. I couldn't find one current. I found some obsolete ones. Do you know of a current auto-update extension ?
Some hosting providers offer an auto-update feature like CloudAccess Smart Updater, SiteGround Auto-Update or A2 Hosting Patchman. As it seems utterly useful, I'm wondering why it's not prominently advertised. Is it because it's simply what's called managed hosting? What's your experience with those hosting providers auto-update features?