It's very easy to say the New Reddit devs were just "doing it wrong" and oversubscribing their components to Redux state, for example. (I love me a good `state => state` selector.) But also, this irrelevant-update problem was pervasive across all of New Reddit, across the app I worked on professionally for five years, and across many other applications I've looked at with the React and Redux dev tools. Irrelevant updates happen all the time with this stack.
If everyone who uses it seriously ends up "doing it wrong", I say it's the framework's fault.
If everyone who uses it seriously ends up "doing it wrong", I say it's the framework's fault.