The joke is that cars have optimistic speedometers to make owners feel like they are faster, and they give up usability for "My speedometer goes up to 11".
I just like being snarky. I get the idea. I far prefer a big center-mounted analog tach with a digital speedo off to the left, as I've said elsewhere in this thread. Everything else can be sprinkled about as necessary. I did actually use the oil pressure gauge in the Mercedes today, though... I really need a new wastegate diaphragm.