Some didn&#x27;t stop caring about it. It&#x27;s all about how much you care about performance, and whether you think no garbage collection is preferable (or not).<p><i>&gt; How low should we go? How useful is it to know about C-style memory management when you&#x27;re a front-end JavaScript Developer?</i><p>There are things in between as well (such as RAII). That&#x27;s about using it. Usefulness of knowing it is another thing. Someone will have to implement things on the lower level either way. I.e. garbage collector itself is going to manage memory after all.