I'm not sure what's going to wear out quicker and what's going to last longer at this point. Since my commute includes a 1600' vertical drop in the first 8.5 miles and I'm driving it EOC, I doubt that's any easier on my brakes.
I have little doubt there's a little extra wear on my starter when I'm in city traffic.
The reality is I came into this being an above average driver, averaging about 27-29 in the winter, 29-31 during the summer and thanks to what I've learned here, I now average 38-39mpg (38.5 lifetime over the last year, 39.5 for the last 90 days). I still have another couple of years on this car before it's time to replace it, but with what I've learned here, I suspect I'll be getting 50+mpg with my next car.