Thank fuck. Anyone who ever thinks it should be "off" or "automatic" with no option for "always on" should be shot. Automatic is fine for a default, but let people force it on or off, and let them pick the limits (within reason).
If I could limit my phones that are plugged in 24/7 to 60% I'd be so happy. If Apple is beating you in user choice then you've done something horrendously wrong.
It may still balloon limited to 80%, but it's far FAR less likely.
Lithium ion batteries are happiest at about 40% charged so if you're storing them that's about where you'd want to change them to. 100% charged isn't very good for them, and 0% is VERY bad for them.