Given that the car drops nearly 50% value as it leaves the lot, I'm not sure how this every pencils out before maybe 10 years 100k+ miles...Maybe these days given how hot the used car market is (driven by the expensive nature of newer vehicles), but again this is a chicken/egg problem.
Your loan is exceedingly abnormal or from a past time as the average loan % in the US is much higher on that time scale.
It loses (less than) 50% relative to the list price, which is an important reason not to pay the list price. I'd estimate that the last new car I bought lost less than 10% relative to the price I actually paid (although selling via a dealer would probably lose another 10% or so).
On the loan rate: yes, fully agreed, this was an unusually good rate, and that makes the arrangement much more attractive.
Your loan is exceedingly abnormal or from a past time as the average loan % in the US is much higher on that time scale.