Has no one mentioned:

platform pedals vs clipless?
is a fixed gear faster that geared bikes?
Size of contact patch - rolling resistance
How much power does "off-loading to the heart" gain you?
Does "going fast" matter if you don't race, and the lemma:
Does "going fast" win road races, and if not does it matter in road races, and its corollary:
Does "going fast" ever matter?

Can you be car-free if you ever hitch a ride?
Can you be Car-light if you don't own one?
Do "cars" hate us for running red lights, or is it the other way around?

Does a springy frame "return" the flex energy back to forward speed?
Can you steer a bike without counter-steering?
If you can balance on a unicycle, is that same position right for a bicycle?