I concur for the most part. But there are times I miss the comfort of having almost every part behind the seat or in the trunk I might need to fix the car along the road.
I agree, so I carry a crankshaft position sensor, a cam sensor, a PCM, a coil, temperature sensor, a MAF and a code reader in all my vehicles.
The only sensor that I have ever had fail(that stopped the engine) was a crankshaft position sensor.