Whyfor Num Lock?

Quick thought here: (1) Why do extended keyboards—that is, ones with a separate number pad—even have a Num Lock key any more? (2) Why does Microsoft Windows default to it being off? 

I get why there is such a key on keyboards that don’t have a number pad, such as laptops. And it makes perfect sense if the “number pad” keys are also letters and stuff that you’d start with it off. But Windows ought to be smart enough to know the difference and choose appropriately—heck, my Mac can even handle the concept of having numlock on for one keyboard and off for another connected to the same machine simultaneously. 

But, more generally, when was the last time a keyboard was made that had a number pad but didn’t have arrow keys? And does anybody ever intentionally turn numlock off for an extended keyboard, in order to use the number pad as arrow keys (interspersed with a bunch of other keys) rather than using the even-closer dedicated arrow keys?

As near as I can tell (based on complaints I hear at work and online), it is solely a historical artifact, whose only purpose now is to screw up passwords and complicate data entry. 

And while I’m at it: why isn’t MSWindows, after all these years, smart enough to overrule that (and other modifier keys) in software with an easy-to-use interface? It’s clearly possible (since OS X can do it), so why do I have to do a registry hack or play around in BIOS (or UEFI, or whatever they are these days) settings to fix this idiocy? 

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