Loading assets in a simple, naive way is indeed solved. If you want "next-gen graphics", you need to push against the limit of your system, much as always. That

Loading assets in a simple, naive way is indeed solved. If you want "next-gen graphics", you need to push against the limit of your system, much as always. That is always tricky, new techniques are being developed every day, game studios have departments dedicated to finding new and better ways to stream data to-and-fro as needed.