It had to do with memory and storage limitations on computers back then. It didn’t make sense to store two extra digits for the date when that space could be used for other data. It affected pretty much every system made before a certain date. https://en.m.wikipedia.org/wiki/Year_2000_problem
Just coming from a civil engineering/construction perspective, the straight lines are probably more about alignment. In these kinds of buildings (and considering US zoning laws that require a certain amount of parking), sometimes the alignment is critical to ensuring the building, parking, and drive-through fit. Straight lines are easy to measure, draw, and check in the field. Not to mention the actual way these 3D printing concrete machines work. The ones I’ve seen online are on some kind of track, and these ones are no different. From the looks of it, they’re kind of set up like those cranes you see at shipyards: https://youtube.com/shorts/igQ9G_Brkl8
His version looks more like this.
Ceci n’est pas un rocher.
I was coming here to say this. Truly a disappointment that the Pentel Twist Erase GT is not included as a choice.
I remember being confused after being handed some wooden disposable spoons at a local screening about 7 years ago. The person handing them out explained it to me, and suddenly I started noticing how obvious the spoons were. I think I had watched the movie a handful of times before, but never really paid attention to the backgrounds unless it was one of the outdoors scenes that were obviously filmed on a soundstage.
Not the original commenter, but I briefly had one professor in college that did that (their book was $50, though). It was an elective course for me, fortunately. I was able to switch for a different class that fit the same requirement without being forced to buy a book the professor wrote.