Fun fact: The standard North American NAD83 coordinate system is misaligned from the actual Earth, off-center by about 7 feet. Someone knows where I am, and I'm in the wrong place.
Datums isn't the problem as it's correctly pluralized in the context of the jargon because they are two different types of datums. The problem is that expanding the acronym breaks the sentence, "But the North American Datum of 1983 and the North American Vertical Datum of 1988 datums are getting replaced soon." It's redundant, like saying ATM machine.
In reality, updating a database to change the coordinates of a location would not physically move items at the location. Arguably, if they did, no-one would much notice, since everything surrounding them should similarly move simultaneously to its corrected position as well.
That's very reassuring, guess I can take my ground harness off then