[lm28469]

ICE wear and tear mostly is due to short trips with frequent stops when the car doesn't have time to heat up properly (ie. city driving) and when you put pressure on the gearbox

If you use the electric part in the city and the combustion engine on the highway you should get very low wear on the ICE (constant rpm/speed at highway speed = low wear and low consumption)

[WirelessGigabit]

So then you run into issues every time you floor your car in electric mode, as that will cause the ICE to kick in and make them work in tandem.

[compsciphd]

not every hybrid has a an electric/gas engine that can work in tandem (some do, but not a requirement0. On the Volt the gas engine wasn't attached to the wheels at all, it was just a generator for the battery.