> I'd still rather have the original than the AI's un-attributed regurgitation.

If what you need happens to be exactly what the library provides — nothing more, less, or different — then I see where you're coming from. The drawback is that the dependency itself remains a liability. With such an obscure library, you'll have fewer eyes watching for supply chain attacks.

The other issues are that 1) an obscure library is more likely to suddenly become unmaintained; and 2) someone on the team has to remember to include it in scope of internal code audits, since it may be receiving little or no other such attention.

> On the other hand, I would be shocked if I had ever used more than 5% of the standard library in the languages I work with regularly.

Hence "non-core". A robust stdlib or framework is in line with what I'm suggesting, not a counterexample. I'm not anti-dependency, just being practical.

My point is that AI gives developers more freedom to implement more optimal dependency management strategies, and that's a good thing.

> unlikely to be improved by that team replicating the parts of the library they need into their own codebase

At no point have I advised copying code from libraries instead of importing them.

If you can implement a UI component that does exactly what you want and looks exactly how you want it to look in 200 lines of JSX with no dependencies, and you can generate and review the code in less than five minutes, why would you prefer to install a sprawling UI framework with one component that does something kind of similar that you'll still need to heavily customize? The latter won't even save you upfront time anymore, and in exchange you're signing up for years of breaking changes and occasional regressions. That's the best case scenario; worst case scenario it's suddenly deprecated or abandoned and you're no longer getting security updates.

It seems like you're taking a very black-and-white view in favor of outsourcing to dependencies. As with everything, there are tradeoffs that should be weighed on a case-by-case basis.