Interesting thought (I think recently more than ever it's a good idea to question assumptions) - but IMO abstractions are important as ever.
Maybe the smallest/most convenient packages (looking at you is-even) are obsolete, but meaningful packages still abstract a lot of complexity that IMO aren't easier to one-shot with an LLM
>>ford+(OP)
Concretely, when you use Django, underneath you have CPython, then C, then assembly, and finally machine code. I believe LLMs have been much better trained on each layer than going end-to-end.