Nevermind syntax, what's a variable? function? class? What's the difference between int/float/boolean string? Nevermind more advanced concepts like O(1) vs O(n). But when the vibe coder just needs to prompt "the page loads really slowly. plz fix" and the LLM can go in, add an index to the right SQL table, add a limit and pagination, so what if I can tell you the difference between PostgreSQL's dialect of SQL vs MySQL, and what the difference is in row types supported. I can describe what happens when you type Google.com into your webbrowser to an inane level of detail off the top of my head, but when the LLM can do an even more through version, I mean, I can pat myself on the back and be smug that I know most of that innately, but what is it really worth?

About a decade back, we, as an industry were collectively learning how to make apps webscale, and oh the blog posts about not using a database as a queue. But the LLMs have ingested all of them. I've only read the ones I came across, and of course my professional experience being part of teams implementing that at various companies. So I've got that going for me, but when the Vibe-platform-dev just has to tell the LLM "hey, when the user hits the send message button, it's slow. /goal make messages fast", and the LLM grinds for hours overnight switching the entire system over to a pub sub event driven architecture and the vibe-platform-dev doesn't even know what pubsub stands for or that they're using one unless they go back and read the transcript. I don't think there's as much of a domain expertise moat for as long as we're hoping.