You're overfitting on the filesystem example. My point is model lock-in. Once a system commits to one hierarchy, it becomes very hard to introduce another auth

You're overfitting on the filesystem example. My point is model lock-in. Once a system commits to one hierarchy, it becomes very hard to introduce another authoritative model. Not only you cannot have alternative models with equal authority, you do not even get a clean parallel hierarchy later; you get the first hierarchy, now ossified, plus workarounds around it. On the other hand, webs are harder to reason about and more expensive to operate, but they can produce hierarchies 'on-demand' and you can get rid of them as easily as you've established them. Ergo, a ton of different programming languages just compile to LLVM IR.