UE has always been a damn huge toolbox. Yes, sure, you can just cobble together all sort of libraries and get a visually very appealing game or, if you want, photorealistic rendering decent enough to back these giant virtual studios for triple-A blockbuster movies, but you will need the hardware to match if you want performance.
If you want performance on everyday hardware, there is no way (and I'd say this holds true for any engine, not just UE5!) that you dig down into the engine an the libraries and invest the money in testing to tune the performance appropriately.
If you want performance on everyday hardware, there is no way (and I'd say this holds true for any engine, not just UE5!) that you dig down into the engine an the libraries and invest the money in testing to tune the performance appropriately.