First, I'll say that I do not doubt that rim brakes can work fine for pretty much any road application (and even some MTB applications), and that they are working for you in the conditions that you are describing.
That said, I will push back on one point.....
Originally Posted by
phughes
I commented on the assertion that discs were necessary for downhills at 45MPH when fully loaded. They aren't. I did that daily for two years in the Ozarks. In fact, rim brakes are often nicer in those conditions because discs can sometimes suffer from brake fade on a long descent.
While it is true that discs can fade under long and hard braking, in general, the amount of braking needed to cause such fade is well beyond what would basically melt rim brakes.