I've "vibe-coded" a few small hobby projects, and use cursor sometimes for professional stuff, and it always collapses for me on "real" front-end tasks. Yeah I can say "give me a layout of a certain style" and it will do reasonably well if it has no existing constraints. But for example, I vibe-coded a UI and then tried to adjust the tailwind theme it picked, and it was an absolute nightmare. You would have thought "change the primary color from A to B, select a new accent color that is darker than what you've selected and is not A or B, and now update the dark theme to be comparable" spread across multiple prompts was one of those crazy 3d animation puzzles you see used as a way to break LLMs.