Cheat Sheet
| Question | Core Idea | Senior Signal |
|---|---|---|
| Q166 | Concurrency | Concurrent rendering is interruptible scheduling, not browser multithreading. |
| Q167 | Transitions | Keep controlled input state urgent; transition expensive derived UI. |
| Q168 | Deferred values | Deferred values let slower consumers lag behind current state. |
| Q169-Q170 | Async continuity | Optimism needs rollback; preserved UI needs resource boundaries. |