theluggage
macrumors G3
While testing the MacBook Neo in-store with some applications in the background, I occasionally noticed some lag even just navigating around macOS. That's what you get with 8 GB RAM. When I do the same thing on my wife's M4 Air with 16 GB RAM, I don't notice that lag.
Sounds like the benefits of having surplus RAM for file caching.
I've got a 32GB Mac Studio. I'm not doing anything at this moment that deserves more than 8GB, but MacOS is still - "using" 16GB of memory plus 15GB of file cache (so, most of that 32GB is getting used). So I guess it's just very rarely having to touch the SSD. Even Apple super-fast SSDs are still an order of magnitude slower than RAM.
Basically, the car with the 1100cc engine will still let you break the speed limit all the way to the shops and back, but the 2000cc model will pull away from the lights just that little bit more smartly and smoothly - if you have the cash to splash... if you need to tow a trailer that's a whole different calculation. 🙂