Road bike gears and drivetrain

Stuff wears out. Stuff keeps getting better. This is especially true of gears and drivetrain stuff. There's a lot of metal working against metal. Even with the toughest materials and the best lubes available, gear things don't last forever. Thanks to the trickle down technology effect, the level of performance and light weight that was previously only found on the top end groupsets from a few years ago can now be found on the entry level groupsets of today. Shimano, Sram and Campagnolo are the Big Three. Which one's best? The answer is, none of them. They're all amazing performers, just a bit dfferent in feel and looks.