Limitations and open issues

• Bindings to elements: field.text, box.checked, and slider.value follow user interaction, except for IDs inside a repeat (use signals and state there). Other element values (x, width, another element's pressed) are read when an expression runs.
• lazy requires equally sized cells and applies only to vertical scrolling.
• Animations: AURA provides animate (with delay and when), enter, exit, loop, spin, pressSink, Ripple, Rive, and animated contentY/contentX. A transition has at most one intermediate value (via); for more stages, distribute them across elements using delay.