Quaseqton, if you actually read those posts, you'll see that it shouldn't be infinite dice because a person can't fall infinitely fast in an atmosphere.
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20d6 after 200' is sort of a 'magic number' leftover from previous editions. Yes, it is a lot easier to survive it these days than it was in those editions. Maybe it should be changed; personally, I think it's pretty convenient, and doesn't slow down gameplay, and I don't really have a problem with someone surviving that kind of fall when they can also survive being immolated in a dragon's fiery breath or being ground to hamburger in the teeth of a shredding column trap.