Personally, I'm running clusters all over the world (for my @BoxyBSD@bsd.cafe) project - Germany, Netherlands, Italy, France, USA, Canada, Singapore, Japan etc. - so there's already a higher node count and this made me create #ProxLB. Since PVE8, I always run unattended upgrade and never had any issues:

* Node Validation
* Patch node
* Validate if patches req. reboot
If yes:
* Move all guests to another node by evaluating free resources (DRS alike style)
* Reboot
* Rebalance cluster again
* goto next node ;)

Even if there would be any issue - what is my benefit by seeing this on the console rather than being notified by the monitoring afterwards and just looking at the logs of the specific node. I'm fully with you for major upgrades, but for minors I never encountered any issues - but that's exactly why I ask - my references may not fit for all setups ;) So, thanks a lot for your feedback - appreciate it!