My BMW tech told me that it can have long lasting effects on the whole drivetrain. All the brand new elements of the car need to adapt themselves to each other. In this period you have a lot of inital friction in the engine and between it’s parts, that’s why you have to do an diff oil change and an oil change right after the period so all the small metal bits that emerged in the breaking in period get removed from the oil system. If you do this too fast (high rpm, high speed) it can result in grooves in the cylinder walls which will have less power and maybe less lubrication than you want as a result. I hope I remembered correctly. All in all it’s a crucial period if you want to have a healthy engine for the rest of your ownership.

Always always always get the laser lights! I didn’t one time and it bothered me every fing time i looked at the car. Also the night driving experience is a lot better imo. Also they look way better than the standard lights imo.