Systems like these made sense in the pre-AI era, where things needed to be organized at the outset to be useful later.
With AI, there's nothing stopping you from dumping a huge pile of information into a single folder and telling an AI what you want to make with it that day.
AI will also just run some query or grep commands against it for the most part and has no magical way of finding connections that a human can’t.
Except that note-taking systems are meant to help you organize your own mind and understand the world better. Offloading tasks to AI won't help you with that.
Actually AI also benefits from thins being organized. I find Skills to be Zettlekasten inspired or wiki inspired in that sense.
Zettlekast has other benefits for humans though. If your goal is to grasp lot of knowladge oyu need to do it in atomic way, connect mentally to what you already know and do spaced repetition to internalize. Zettlkeaste forces you do it it all as part of organizing. Basically by organizing you make it your own.
Yes AI can help today but it also means it does not stay in your head. Not sure its important if it is in your head or you can call AI at any moment instead of your own memory.