Right for right handers because your right hand is stronger and has more dexterity. I've been riding like that for thirty years.
Originally Posted by
HerrKaLeun
6. For cable brakes the argument is that routing is better with front-left.
Not enough to matter. The slight extra bend to end on the right side is insignificant compared to the tight curve to run the housing under the bar tape.
1. What I read is downshifting is harder since when you brake the shift lever would be at the same right hand as my primary brake.
It doesn't matter except during emergency stops when you have better things to do than shift, and even then you're usually in a gear you can start in although it's not ideal.
2. When I sell this bike I probably have to switch it back for legal and liability reasons.
Only new bikes are legally required to come with front brake on left when the purchaser does not request otherwise.