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> As long as the space comes back when you need it, you don't have to care.

That's a common assumption but it's also a lie: because you do have to care about wearing your media, reducing its lifespan. Abusing storage with heavy doses of r/w activity (which is what swapping does) is not good. Yes, the issue is not as bad in modern "disks" as in rust-spinners, and can often look like a matter of efficiency (because of how memory is physically "flipped", on modern drives it's more efficient to write a ton of data rather than a few bytes), but in reality you are wearing your disk more than you would if macOS kept its grubby hands to itself.

Of course this is not a downside for the people who will sell you replacement disks, or rather replacement machines (since drives are now soldered), who coincidentally happen to be the people who develop the disk-wearing OS.



> Yes, the issue is not as bad in modern "disks" as in rust-spinners

Unlike SSDs, hard drives never bothered to track IOP counts and accumulated read-write volume.


Swapping to a spinner made that memory borderline worthless, compared to modern SSD swap speeds, I'd guess is a better comparison.




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