Do Upgrades On Your Bike Always Make You Go Faster?

Cycling is always known to be in the constant pursuit of speed, but, are there some upgrades that you can make to your ride which not only make it better but potentially slower?
Cycling Weekly's Sam Gupta looks into all the ways he believes you can improve your time on the bike and have more fun but potentially at the detriment of going fast. For some, these may be the best cycling upgrades out there.