Cruise control should come standard on all vehicles these days, I don't see how such "technologically advanced" vehicles have such a hard time offering something as simple as an $80 cruise stalk and wiring. The ECU already has the program to handle cruise, they just want you to fork out more money for the plastic stalk.
Until there's a shift in perception amongst all automakers and/or demand in the marketplace, I don't see what used to be "luxury items" like cruise control be standard across the board.
The argument could be made on anything made today (computers, televisions, etc.). In reality, the cost of integrating the part could be only pennies. However, marketing dictates that it's a "premium" item, so it gets optioned and priced accordingly. In reality, there are still people who just look at the dollars. So, even though a cruise control element could "only" be $80, the rationale for some is that it's a "useless feature" they won't use, so they'd rather keep the $80 in their pocket.