They are definitely the easiest on parts. Softer on the drivetrain, least load on the bottom end. 1000 hp turbo vs. 1000 hp n/a and the turbo engine will last much longer. Same thing compared to a blower combo. Turbos aren't free (you lose some VE with the backpressure of a turbo combination) but it's peanuts in comparison to the power required to drive a blower, and the cylinder pressure on a turbo is showing up at a more reasonable spot in the cycle. Something like a common 2.3L TVS or Whipple is 150 hp of power consumption at redline, so to make 700 with a combo like that, the engine is seeing 850 hp worth of load in the cylinders.