I have talked with a friend of mine who owns a 4 year old 116i F20, but with 120000km (pretty intense)
He had some of the same issues.
at 10000KM turbo intake pipe completely ripped while driving (mine was only cracked partially).
He had oil leaks from the vacuum pump and the head gasket same like me...and other issues with water leak.
I guess in the end it comes down to your driving style, I am pretty cruel with my car, aggressive driving often, sport mode...Etc...I guess in the end thats the reason i bought the car for the first place
Now i am paying for that...eventually it comes down to Turbocharged engine with higher pressures and dissipating heat in the engine bay.
The vent screw on the coolant just broke when i tried to remove it for replacement.