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I think you might be very surprised by what you can do with eight gigs of RAM on Apple Silicon. Apple does hardware compression into memory - it performs as well as a 16 GB machine did with an Intel chip.
I don't know where this myth has come from that macOS magically uses less RAM even though you are using the same applications as everyone else. The Just Josh Tech review of the MacBook Neo demonstrated that the Neo cannot do a fractional resolution playback of a very simple Adobe Premiere project. We are not even talking about doing any editing work, simply playing back the project in the timeline. The ~$500 Acer loa…
Well, you're certainly not running the same code on both systems. Some applications absolutely use less RAM on MacOS... some use less on Windows.
Some of this is due to the various builds of the software itself, some of it is due to architectural differences in memory management, CPU instructions, differing memory access capabilities, etc.
8GB is tight for power users, definitely. But it is certainly very usable for on a Mac for the average person.