this is pretty nonsense for a small or home server. it isn't that hard to make something essentially completely bulletproof over a small surface area
the issues mainly come from sprawling enterprise infrastructure, running thousands of random endpoints across software nobody cared to write carefully
The only way to make something bulletproof is to get rid of it's network cards, or take so much out of it, it's nearly useless.
The recent Windows and Linux kernel exploits should at least give you some idea on how good these models are at exploiting stuff.
Computers can't have their zero days exploited if all packets coming from unauthenticated clients are dropped. I believe the future is wireguard on everything.
Don't let your computers talk to strangers. If it must, then do it from inside an isolated environment based on actual hardware virtualization with no shared kernels. If these models break through the hardware hypervisor, it means the entire industry is in deep shit, not just you personally.
So how does DNS work in this world you're imagining?
Where does this hardware exist now?
Who is writing the code for the underlying pieces you don't control?
So ya, computing is build on a house of insecure cards and we're all in deep shit.