If you learned React a few years ago and stopped, the biggest shift isn't a new library — it's where code runs. Server components let you fetch data and render markup on the server by default, with client-side interactivity opted into deliberately, instead of the other way around.
Routing has moved from a single client-side router to a file-based system that understands layouts, loading states and errors as first-class concepts, which used to take a fair amount of boilerplate to hand-roll.
On the backend side, the fundamentals — Express, MongoDB, REST design — haven't changed much, which is reassuring. What's changed is how much of the 'glue' code you used to write by hand is now handled by the framework, which means more of your time goes to the actual product logic.
Our MERN Full Stack track is refreshed every cohort against exactly this kind of shift, so what you deploy in your final project reflects what teams are actually shipping with today.
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