My wife’s 8GB MacBook Air crashed yesterday with Firefox and Find My open and nothing else because of running out of RAM, so, sort of, but they’re not magic. (Find My was using 3GB of memory!)
If you mean it showed the out of memory dialog, that wouldn't be caused by an app using 3GB. The dialog shows up at ~48GB swap space used on an 8GB Mac, or when you're out of disk space and can't write a swap file.
More to do with the faster storage allowing you to swap without noticing it as much. There was this whole trend when m1 first came out of people saying it didn't matter if you got the lowest spec because the ssd was so fast it made up for the lack of ram... totally ignoring that swapping like that was destroying their drives really fast.
