Adam part of the reason turbo's are easier on parts is the drive method... A procharger engine will need 10 hp of drive for every 100 hp added... 2200 hp worth of mass air to net 2000... 200 hp gets eaten up by the drive... a turbo uses no crank power but instead normally wasted exhaust to drive it.
200 hp on the end of the crank and block that wasnt designed for that extra load makes some difference in reliability. That extra 200hp worth of air has to come from somewhere... as mentioned ...higher rpm is where most go to get that extra air... thus adding to the durability equation. The drive itself also needs to be durable.
Turbos using exhuast to drive things also have back pressure which tends to act as a shock absorber for the pistons... at both ends.
Past year or so there seems to be some great improvements in boost control/traction control software that helps from launch to top end. like any good effort it takes data logging to get a good read on whats going on and refine the tune.
Turbo's are load sensitive... more you load them the stronger they tend to come on... they usually dont need or want alot of gear... without good boost/traction control management your car can get slippery at the shift point even though it hooked hard at launch the pull after the shift can get interesting... Sure is interesting to watch a fast turbo car from mid track to finish...
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