IF AND WHEN that time comes, when I have to re-paste in the entire data directory (Bitcoin), I just hope that there will be no errors with permissions. Come to think of it, in Roaming I have some programs I never use. I could test one in exactly the way I would do with Bitcoin . . .
Windows security is rather lax by default for user data, so it's very unlikely you'll encounter permission error.
I am very ambivalent about UPS's: a. You also need to connect your monitor which uses more power
It's true, although AFAIK many monitor only use 15-25 watt.
b. You only have some minutes to shutdown and we can't be at our computers 24/7
I agree, it's rather annoying. The only solution is using UPS which can communicate with your computer[1]. But you need to make extra steps when you use Linux[2].
I use a cold wallet and run the Core to support the blockchain.
If that's the case, I assume bandwidth isn't a problem. Correct? I'd go without backups: if a power outage breaks your
blocks directory, just let it sync from scratch.
If you could afford to make a backup, i would recommend you to do it rather than "wasting" resource of other Bitcoin node.
[1]
https://www.howtogeek.com/183102/how-to-gracefully-shutdown-your-pc-with-a-ups-unit-and-why-you-should/[2]
https://superuser.com/a/1021439