That would help prevent disruption of service! 
Edit:
I thought something along the lines of a button between install and skip that would do the config check now but schedule the update itself for later. That way I could still read the release notes first (and it doesn’t always just blindly installs at night as soon as its available
)
You can create an automation to update add-ons. Not sure about core, possibly. Only looked for 20 seconds…

I’ve a Blueprint for this:
See edit as to why I’d prefer a different solution 
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I liked your idea.