This isn’t a gloat post. In fact, I was completely oblivious to this massive outage until I tried to check my bank balance and it wouldn’t log in.
Apparently Visa Paywave, banks, some TV networks, EFTPOS, etc. have gone down. Flights have had to be cancelled as some airlines systems have also gone down. Gas stations and public transport systems inoperable. As well as numerous Windows systems and Microsoft services affected. (At least according to one of my local MSMs.)
Seems insane to me that one company’s messed up update could cause so much global disruption and so many systems gone down :/ This is exactly why centralisation of services and large corporations gobbling up smaller companies and becoming behemoth services is so dangerous.
Windows does have a fallback mode called safe mode and that’s exactly what’s being used to fix this utter mess.
Package management isn’t going to save you from this as it didn’t save the Linux systems affected last time. It didn’t stop Arch Linux from failing to boot after a Grub update either.
Windows also has drive cloning tools, that isn’t unique to Linux.
NixOS isn’t immutable. It’s not an a/b root system and / isn’t read only. Rather it’s what’s known as reproducible. I am not convinced NixOS would make this any easier either given how simple the fix was. Funnily enough though tools exist called ansible and puppet for configuring systems in repeatable ways that apply to both other Linux systems, Windows systems, and even macOS.
There are like one or two valid points in this whole comment and the rest is pretty much falsehoods and misconceptions.
Edit: Forgot to mention tools exist to make Windows immutable as well. So that is an option.