I've never broken a car in either and I bought my first brand new one in 2000 and a few more since then.Is this still a thing with modern technology? I've never "broken in" an engine since I bought my first new car in 2006, and I've never had problems.
I'm pretty well on the same line as Cman. I did my first oil change at about 800kms and my second at 6000kms. (The dealer will do the next at 10,000kms....keep within the warranty). Of course I also took it easy for the first 1000kms BUT, then again I pretty well take it easy most of the time. I can appreciate those who think it's not required but, then again, apart from the cost of the oil and my time it doesn't hurt. In fact it might even help but who knows the truth? To each his/her own.I take it easy for the first 1200 kms. Easy on the brakes and I do manual mode while driving upshifting and downshifting varying the engine revs. I also did an oil change at 800kms. Now the next change will be at 4000kms and I go 4k after that for oil changes.
I'm at 1600+kms now about a month since getting the car...............now I let'r rip!!!!!
On the other hand when I worked at a marina in my youthful days, I had seen some pretty sorry messes that started their existence as outboard motors but were obviously abused until they died a slow and agonizing death (although usually at a very tender age and still supposedly under warranty.) The owners of these atrocities naturally claimed that they had babied their motors and treated them with utter respect. Right!I"ve never heard of any failures attributed to not "breaking in" a vehicle. People do it to make themselves feel good and that's okay.