If you want triplets, make sure to include this in the deck:

Seriously, just *look* at that list of games where they were support staff. The Switch would still have been fine without them, probably, but they were a major factor in making Breath of the Wild the juggernaut it became.
Now, to be fair, Nintendo acquiring Monolith Soft was 2007, before Xenoblade.

It's like how the existence of the glass enclosure on the Popemobile in Cars 2 implies that the 1981 assassination attempt on their equivalent of John Paul II still happened.

Something to note about the OD&D Sample Level, I think, is that it's clearly less of an actual dungeon and more just a showcase for various mapping tricks. There are no useless locations, they all serve some purpose in illustrating the "Traps & Tricks".
"Here's a vocabulary; find a way to use it."

Honestly it might just be as simple as "there are ten segments, so why not just roll 1d10".

This other Dragonsfoot post is relevant here, I guess, since it looks like this was a common houserule back in the day:

Reading a DragonsFoot thread on the topic it seems like they're probably just houserules:

I guess I was user #413,583, huh?