Then you're on your own. What the duck 🦆 do you expect to happen if you can't even invest the 10sec to skim over a message (in the few events that there even is one) to see if it affects you and any manual intervention is required.
A fully functional system, just like any other normal OS?
You hit update - boom - you get one, seamlessly, with no breakages and no other user interaction. And that's how it works pretty much everywhere - except, you know, Arch.
If you're fine with it - that's fine, go ahead and tinker all you like. But don't expect others to have the same priorities.
Man that's news from 2016, like, it's a bit rare occasion, y'know. You're way more likely to get borked by Arch even after reading all the instructions, and it did happen numerous times.
Touching grass is what I do when you take steps to intervene in your system to make an update work.
I see you are an Arch maximalist, but that goes beyond reason. Even Arch proponents are normally not as aggressive on the topic, and admit Arch is too complicated in that regard.
The only problem here is that snapshots (and btrfs for that matter) are not the default behaviour. I would really appreciate Endeavour having this as the default setup. It is very likely what you'd want.
Yes, Garuda does, even with bootable snapshots, but it's otherwise not as clean as Endeavour. As far as I can tell, mkinitcpio/GRUB2 or their setup thereof causes more problems than it solves. My system was bricked multiple times until I switched to a dracut/systemd-boot setup, which works flawlessly since quite a while.
As for the user experience, there are 0 distros you should perform a (major) upgrade on without taking a snapshot first. I had broken systems after apt upgrade. From my point of view rolling vs versioned release are basically occasional mild vs scheduled huge headaches.