If you do a search on this topic, you might find;

All the metals in the cooling system are the same or similar enough to aviod corrosion.

The environmental rating of an automobile is affected by the quantity of waste fluids that it generates during its lifetime, hence no periodic antifreeze or transmission fluid changes are reccomended.

Change the antifreeze when cooling system work is done. (That is what I did.)

And so forth.

Somewhat curious.
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3 8s & 2 7s 725,000 miles total