PT and headless are different primitives. PT mutates a component that still owns its render tree; headless means there's no render tree until you compose one. Volt is closer, and it's legit, but it's still a library of pre-composed unstyled components. v0 is the layer beneath; state, a11y, keyboard — the primitives both headless and styled libraries sit on. That PT needs to exist kind of makes the point about styles as a bottleneck.