Comment by psychoslave

Reliable is only slightly related to be maintenable.

ECU embedding makes the whole system more complexe. That is not necessary absolutely a bad thing, but the trade-off is different. And there is on top of that a different topic which is how electronics are used to enforce obsolescence and make harder to maintain the vehicle without special equipment of the specific firm. This can also be enforced with more analogical stuffs of course, but electronic devices are more likely to be used this way.