Well, there are a few standalone examples here or there, but "flexbox is enough" is verifiably false.
Here's an actual app and not the anemic crap that people call "apps" on the web: https://x.com/dmitriid/status/1424052288205856773
Yes, yes it would. That is why I wrote this: "Just giving the ability to get an element's size without causing a full-page re-flow and re-layout would give much more power to UIs than any number of relative sizes and container queries."
Because on the web you can barely make custom widgets and it's almost impossible to do custom layouts.
Unless, of course, you use the equivalent of early 2000s Windows GDI in the form of Canvas, or a limited subset of OpenGL in the form of WebGL etc. And yes, people end up resorting to that. Look at what Figma wrote: https://www.figma.com/blog/building-a-professional-design-to... "Pulling this off was really hard; we’ve basically ended up building a browser inside a browser"
To repeat my statement: UI didn't suddenly appear in 2024 out of nowhere. We know what an app UI looks like. And the anemic "flexbox is good for most apps" is verifiable bullshit. This is the constructive criticism.
Edit. Also the sibling comment: https://news.ycombinator.com/item?id=40440939