Massive overkill for me (Public Board)
Dictum, what is the "use case" of your setup?
16TB+ online
Multiple OSs seemingly all used frequently
What on earth do you keep online, anyway, that you need 16TB of total storage?
I posit that my approach would work for almost anyone unless they are doing data science or data warehouse work at home.
I can see multiple backups that consume that much (or more) space but are usually disconnected.
What I have feels controllable, maintainable, and safe. And the last data loss terror I had was in Windows, 6 years ago.