pawsplay
Hero
So? It isn't as if being borrowed should discount them. It simply suggests that the "soul" was established early, and transferred from early games to later. You somehow expect it to be different than that? Like each would have it's own soul, developed independently, but they'd somehow be the same? Unless you can time travel, this is what you'd expect to see - the soul being passed down over time, with modifications as it goes. Hobby reincarnation, if you will.
The relationship is reciprocal insofar as the game's real "sacred cows" are generally not new, but old. In terms of outright iconic critters, it seems to me the majority, the things that pop into people's minds first, come from the early days, not the later days.
Except that lineage only extends back as far as AD&D. Thus, the bulk of my formative D&D experiences do not include many of those supposed sacred cows. The Red Box was probably the hottest selling D&D product of all time; my experience is not unusual.
So from my standpoint, the "sacred cows" are new, not old. I'm not sure if you're just not understanding what I'm saying or what, but the "reincarnation" you are talking about does not travel through one of the most popular, if not the most popular, editions of D&D ever published.
To my eye, this sinks your point, rather than supports it. To me, 2/3 is beyond a solid majority. While not literally 99%, the spirit is there. Pick a monster at random, and chances are good that it crosses the edition boundaries.
Say only 2/3 of the BECMI monsters are in AD&D. Now, what percentage of AD&D monsters are in BECMI? AD&D has a much larger published bestiary. If you have 68 BECMI monsters, 129 shared monsters, and another 143 (for instance) AD&D monsters, then only 129 out of 340 monsters are shared, which means any given random monster is LESS than 50% likely to cross the edition boundaries. Once you throw in 4e, forget about it. And 143 AD&D monsters is a random number I just came up; it's probably a paltry estimate. There is a Monstrous Compendium for each AD&D setting. The Creature Catalog forum hosted on this site is, if you will pardon the expression, monstrous.
So "chances are good that it crosses the edition boundaries" is very likely false. If you pick a particularly well-known monster, it actually gets worse, because "iconic" creatures like the drow and the devilish hordes were almost never backported to BECMI. So even saying that's true for entire editions of D&D is false, which is a pretty generous interpretation of "the spirit." I'm pretty sure "the spirit" should include specific campaigns, because we are talking about the soul of D&d experience, not the sum of the D&D pantry.
So when you say
In terms of outright iconic critters, it seems to me the majority, the things that pop into people's minds first, come from the early days, not the later days.
I'm betting your thinking things like: drow, death knight, Asmodeus, draconian, roper, umber hulk, silver dragon, Tiamat, Bahamut, slaad, otyugh, rot grub, tiefling, modron, flumph, kuo-toa, sahaugin, mind flayer, intellect devourer, piercer, etc. and you just aren't registering that none of those things exist in the Rules Cyclopedia.