I feel for people who just took delivery and missed some new thing, even if the new thing is relatively minor like cupholders and USB charging ports.
One of the joys of owning a nearly 4 year old Model S, is that when a new feature comes out, I now only feel joy for the proud new owner that found a feature that was a sort of unannounced "Easter Egg" than sadness that I missed out. In fact, the longer I hold on to this car, the more "new to me" features I will enjoy in the next one, so there is even some joy of anticipation that comes with that.
Congrats on your new Model S, and on your "find".