Not true. I would totally notice a quieter drivetrain, feel the different saddle, appreciate the drop of the new stem (and the bars I have won't fit it), be grateful for the security of good straps and ground clearance of the new pedals and shorter crank arms, benefit from the bomp-proffness of new wheels/hubs, and the new fork is needed for the new stem. So, the seatpost is the only thing that is only asthetic. While the choices above may have asthetics in mind, that's not the sole purpose. But **** it, it'll be bad ass.