Sam and Ryan talk about how both the key prop and useEffect can be used to solve similar problems, and discuss which approach is better. They also talk about the difference between handling data using models with methods vs. using POJOs with pure functions. Topics include:0:34 – Model with methods vs POJOs with functions16:44 – Comparing explicit, verbose code in React vs. other frameworks29:34 – Dumb vs. smart components, and using keys vs. effects47:47 – If a high-level API misses enough use cases, should it even exist?Links:Sebastian's tweet about using the key propSam and Ryan's video hacking on the REPL