People are like "let's fork Linux", "let's make a new OS", or "let all switch to BoobsBSD" kinda need to chill tho.
It is a very common misconception of software especially pervasive amongst coders, that you can just whip up any sort of software package at a whim and build something equivalent to the existing, enduring packages.
Software is a social infrastructure not a product, it is built up over time, it's additive, and accumulative. It slowly accumulates features, edge cases, users, expertise, experts, social purchase, a literature of documentation, help, user/developer's public discussions, and similar.
Something like an OS or a big app also accumulates addons, apps, drivers, extensions, or whatever else they might be called.
When you say "let's make a new Linux", it's like saying the metro sucks let's build a new one. Let's use city X's trains to go to our jobs at city Y that we live in. Let's switch to horse drawn carts instead of the metro.
People would protest if the municipality just decided that they'd trust unpaid teenager interns to drive all public transport vehicles. You wouldn't dream of setting up an entire new transport network because (1) the existing one is YOURS it's a public good, and (2) it's fucking impossible are you insane?
But when it comes to software it feels like it's this simple and easy trivial thing. It's perhaps the exact same mindset that trusts it to LLMs: it's insubstantial and easy, why worry!? Well cos it's fucking not, that's why.