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I can't remember the last time I even considered using inheritance in javascript ... except to consider it unnecessary and strewn with mines.

This seems unlikely. Almost every modern Javascript framework uses it. ie) class MyComponent extends React.Component {}

Even React is de-emphasizing class inheritance in favor of more function components.

Yeah and with hooks they arent even necessary at all anymore.

With one caveat: you still need class components for error boundaries. https://reactjs.org/docs/error-boundaries.html