I think for tooling around in SF on mostly 1-2 mile rides with lots of stop and go, the advice works well, but that's not what I can give advice on. For the 10

I think for tooling around in SF on mostly 1-2 mile rides with lots of stop and go, the advice works well, but that's not what I can give advice on. For the 10-mile-one-way mostly suburban regular commutes I used to ride, I second the road bike. I originally started riding on a hybrid and switched to a pure road bike, and I picked up major speed. The ride quality difference didn't matter much, as I was already lifting up a bit out of my seat over bumpy asphalt. My commute is now 1.5 miles and I use a scooter. Southeastern summer weather makes biking any more than a few blocks an exercise in getting drenched in sweat, which is not really worth the shower and change.